How Earth's History Shaped Human History


By Lewis Dartnell

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A New York Times-bestselling author explains how the physical world shaped the history of our species

When we talk about human history, we often focus on great leaders, population forces, and decisive wars. But how has the earth itself determined our destiny? Our planet wobbles, driving changes in climate that forced the transition from nomadism to farming. Mountainous terrain led to the development of democracy in Greece. Atmospheric circulation patterns later on shaped the progression of global exploration, colonization, and trade. Even today, voting behavior in the south-east United States ultimately follows the underlying pattern of 75 million-year-old sediments from an ancient sea. Everywhere is the deep imprint of the planetary on the human.

From the cultivation of the first crops to the founding of modern states, Origins reveals the breathtaking impact of the earth beneath our feet on the shape of our human civilizations.


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Why is the world the way it is?

I don’t mean this in a musing philosophical way–why are we all here?–but in a deep scientific sense: what are the reasons behind the major features of the world, the physical landscape of continents and oceans, mountains and deserts? And how have the terrains and activities of our planet, and beyond that our cosmic environment, affected the emergence and development of our species and the history of our societies and civilisations? In what ways has Earth itself been a leading protagonist in shaping the human story–a character with distinctive facial features, a variable mood, and prone to occasional fractious outbursts?

I want to explore how the Earth made us. Of course, each of us is literally made of the Earth, as is all life on the planet. The water in your body once flowed down the Nile, fell as monsoon rain onto India, and swirled around the Pacific. The carbon in the organic molecules of your cells was mined from the atmosphere by the plants that we eat. The salt in your sweat and tears, the calcium of your bones, and the iron in your blood all eroded out of the rocks of Earth’s crust; and the sulphur of the protein molecules in your hair and muscles was spewed out by volcanoes.1 The Earth has also provided us with the raw materials we’ve extracted, refined and assembled into our tools and technologies, from the roughly fashioned hand axes of the early Stone Age to today’s computers and smartphones.

It was our planet’s active geological forces that drove our evolution in East Africa as a uniquely intelligent, communicative and resourceful kind of ape,* while a fluctuating planetary climate enabled us to migrate around the world to become the most widely spread animal species on Earth. Other grand-scale planetary processes and events created the different landscapes and climate regions that have directed the emergence and development of civilisations throughout history. These planetary influences on the human story range from the seemingly trivial to the deeply profound. We’ll see how a sustained cooling and drying in Earth’s climate is the reason why most of us eat a slice of toast or a bowl of cereal for breakfast; how continental collision created the Mediterranean as a bubbling cauldron of diverse cultures; and how the contrasting climate bands within Eurasia fostered fundamentally contrasting ways of life that shaped the history of peoples across the continent for millennia.

We have become greatly concerned about humanity’s impact on the natural environment. Over time our population has exploded, consuming ever more material resources and marshalling energy sources with greater and greater proficiency. Homo sapiens has now come to replace Nature as the dominant environmental force on Earth. Our building of cities and roads, damming of rivers, and industrial and mining activity are having a profound and lasting effect, remoulding the landscape, changing the global climate and causing widespread extinctions. Scientists have proposed that a new geological epoch should be named to recognise this dominance of our influence over natural processes on the planet–the Anthropocene, the ‘recent age of humanity’.2 But as a species we are still inextricably linked to our planet, and the Earth’s history is imprinted in our make-up, just as much as our activities have left their distinct marks on the natural world. To truly understand our own story we must examine the biography of the Earth itself–its landscape features and underlying fabric, atmospheric circulation and climate regions, plate tectonics and ancient episodes of climate change. In this book we’ll explore what our environment has done to us.

In my previous book, The Knowledge,3 I set out to solve a thought experiment: how we might reboot civilisation from scratch as quickly as possible after some kind of hypothetical apocalypse. I used the notion of the loss of all that we take for granted in our everyday lives to explore how civilisation works behind the scenes. The book was essentially an investigation of the key scientific discoveries and technological innovations that enabled us to build the modern world. What I want to do this time is broaden the perspective, to discuss not just the human ingenuity that got us to where we are today, but to follow the threads of explanation back even further. The roots of our modern world stretch far back in time, and if we trace them deeper and deeper across the changing face of the Earth, we uncover lines of causation that often take us all the way back to the birth of our planet.

Anyone who’s ever chatted with children will know what I mean here. For an inquisitive six-year-old asking about how something works or why something is the way it is, your immediate answer is never satisfactory. It opens up further mysteries. A simple initial question invariably leads to a whole series of ‘why?’, ‘but why?’, ‘why is that?’ With an unquenchable curiosity, the child tries to get to grips with the underlying nature of the world it finds itself in. I want to explore our history in the same way, drilling downwards through more and more fundamental reasons and investigate how seemingly unrelated facets of the world in fact share a deep link.

History is chaotic, messy, random–a few years of poor rainfall lead to famine and social unrest; a volcano erupts and annihilates nearby towns; a general makes a bad decision among the sweaty clamour and gore of the battlefield and an empire is destroyed. But beyond the particular contingencies of history, if you look at our world on a broad enough scale, both in terms of time and space, reliable trends and dependable constants can be discerned, and the ultimate causes behind them explained. Of course, our planet’s make-up has not preordained everything, but profound overarching themes can nonetheless be distinguished.

Our survey will reach over a staggering span of time. The entirety of human history has played out on an essentially static map–within but a single frame of the Earth’s movie. But the world hasn’t always looked like this, and although continents and oceans shift over geologically slow timescales the past faces of the Earth have greatly influenced our story. We’ll look at the changing nature of the Earth and the development of life on our planet over the past few billion years; the evolution of humans from our ape ancestors over the last five million years; the increase in human capabilities and dispersal around the world over the past hundred thousand years; the progression of civilisation over the last ten thousand years; the most recent trends of commercialisation, industrialisation and globalisation of the last millennium; and finally how we have come to understand this wondrous origin story over the last century.

In the process we’ll travel to the ends of history–and beyond. Historians decipher and interpret humanity’s written accounts to tell the story of our earliest civilisations. Archaeologists brushing the dust off ancient artefacts and ruins can tell us about our earlier prehistory and lives as hunter-gatherers. Palaeontologists have pieced together our evolution as a species. And to peer even further back through time we will turn to revelations from other fields of science: we will be browsing the records preserved in the layers of rocks that make up the very fabric of our planet; we will be reading the ancient inscriptions of the genetic code stored in the DNA library inside each of our cells; and we will be peeping through telescopes to survey the cosmic forces that shaped our world. The narrative threads of history and science will be intertwined throughout the book, making up the warp and weft of its fabric.

Every culture has developed its own origin story–from the Australian Aborigines’ Dreamtime to the Zulus’ creation myth. But modern science has built up an increasingly complete and fascinating account of how the world around us came to be, and how we took our place within it. Rather than relying solely on our imagination, we can now elucidate the chronicle of creation by using these tools of investigation. This, then, is the ultimate origin story: the tale of the whole of humanity and also that of the planet we live on.

We’ll explore why the Earth has been experiencing a prolonged cooling and drying trend over the past few tens of millions of years, and how this created the plant species we came to cultivate and the herbivorous mammals we domesticated. We’ll investigate how the last ice age enabled us to disperse across the globe, and why it is that humanity only came to settle down and develop agriculture in the current interglacial period. We’ll look at how we have learned to extract and exploit a huge diversity of metals from the crust of the planet that have driven a succession of revolutions in tool-making and technology throughout history; and how the Earth gave us the fossil energy sources that have powered our world since the Industrial Revolution. We’ll discuss the Age of Exploration in the context of the fundamental circulation systems of the Earth’s atmosphere and oceans, and how seafarers came to understand wind patterns and ocean currents step by step to build transcontinental trade routes and maritime empires. We’ll explore how the Earth’s history has created the geostrategic concerns of today, and continues to influence modern politics–how the political map of the south-eastern US continues to be shaped by sediments from an ancient sea that existed 75 million years ago, and how voting patterns in Britain reflect the location of geological deposits dating to the Carboniferous Period 320 million years ago. It is through knowing our past that we can understand the present, and prepare ourselves to face the future.

We’ll begin our ultimate origin story with the most profound question of all: what planetary processes drove the evolution of humanity?

* Incidentally,the East African Rift was not only the evolutionary cradle and early nursery of humanity, but also the region where I spent my own childhood: attending school in Nairobi and holidays with family around the savannah, lakes and volcanoes of the Rift Valley. It’s these experiences that have given me a lifelong interest in understanding our origins.

Chapter 1

The Making of Us

We are all apes.

The human branch of the evolutionary tree, called the hominins, is part of the wider animal group of the primates.* Our closest living relatives are the chimpanzees. Genetics suggest that our divergence from the chimps was a long and drawn-out process, beginning as early as 13 million years ago, with interbreeding continuing until perhaps 7 million years ago.1 But eventually our evolutionary histories did separate, with one side giving rise to today’s common and bonobo chimpanzee, the other branching into the different hominin species, with our own kind, Homo sapiens, forming just one twig. If we look at our development in this way, humans didn’t evolve from apes–we are still apes, in the same way that we’re still mammals.

All the major transitions in the evolution of hominins took place in East Africa. This region of the world lies within the rainforest belt around the equator of the planet, on a level with the Congo, the Amazon and the tropical islands of the East Indies. By rights, therefore, East Africa ought to be densely forested too, but is instead characterised by mainly dry, savannah grasslands. While our primate ancestors were tree-dwellers, surviving on fruit and leaves, something drastic happened in this region of the world, our birthplace, to transform the habitat from lush forest to arid savannah, and in turn drive our own evolutionary trajectory from tree-swinging primates to bipedal hominins hunting across the golden grasslands.

What are the planetary causes that transformed this particular region to create an environment in which smart, adaptable animals could evolve? And as we are only one of a number of similar intelligent, tool-using hominin species to have evolved in Africa, what were the ultimate reasons why Homo sapiens prevailed to inherit the Earth as the sole survivor of our evolutionary branch?


Our planet is a restlessly active place, constantly changing its face. Fast-forwarding through deep time you’d see the continents gliding between myriad different configurations, frequently colliding and welding together only to be ripped apart again, with vast oceans opening and then shrinking and disappearing. Great chains of volcanoes pop and fizzle, the ground shivers with earthquakes, and towering mountain ranges crumple out of the ground before being ground away back to dust. The engine powering all this fervent activity is plate tectonics, and it is the ultimate cause behind our evolution.

The outer skin of the Earth, the crust, is like a brittle eggshell encasing the hotter, gooier, mantle beneath. The crustal shell is cracked, fragmented into many separate plates that rove across the face of the Earth. The continents are made up of a thicker crust of less dense rocks, while the oceanic crust is thinner but heavier and so doesn’t ride as high as the continental crust. Most of the tectonic plates are made up of both continental and oceanic crust, and these rafts are constantly jostling for position with each other as they bob on top of the hot churning mantle and ride the whims of its currents.

Where two plates butt into one another, along what is known as a convergent plate boundary, something has got to give. The leading edge of one of the two plates is shunted beneath the other and is dragged down into the rock-melting heat of the mantle, triggering frequent earthquakes and feeding an arc of volcanoes. Because the rocks of the continental crust are less dense and so more buoyant, it is almost invariably the oceanic crust portion that sinks beneath the other in a plate collision. This subduction process continues until the intervening ocean has been swallowed, and the two chunks of continental crust become welded together, a great crumpled chain of mountains marking the impact line.

Divergent, or constructive, boundaries are the places where two plates are being pulled apart from each other. Hot mantle from the depths rises up into this rent, like blood welling into a gash in your arm, and solidifies to form new rocky crust. Although a new spreading rift can open up in the middle of a continent, ripping it in two, this fresh crust is dense and low-lying and so becomes flooded over with water. Constructive boundaries form new oceanic crust–the Mid-Atlantic Ridge is one prominent example of such a seafloor spreading rift.2

Plate tectonics is an overarching theme of the Earth we’ll return to throughout the book, but for now we’ll focus on how the climate change it drove over recent geological history produced the conditions for our own creation.

The past 50 million years or so have been characterised by a chilling of the global climate. This process is called the Cenozoic cooling, and it culminated 2.6 million years ago in the current period of pulsing ice ages that we’ll look at in detail in the next chapter. This long-term global cooling trend has been largely driven by the continental collision of India into Eurasia and the raising of the Himalayas. The subsequent erosion of this towering ridge of rocks has scrubbed a lot of carbon dioxide out of the atmosphere, resulting in a reduction of the greenhouse effect that was previously insulating the planet (see Chapter 2), and leading to declining temperatures. In turn, the generally cooler conditions drove less evaporation from the oceans to create a less rainy, drier world.

Although this tectonic process happened some 5,000 kilometres away across the Indian Ocean, it also had a direct regional effect within the theatre of our evolution. The Himalayas and Tibetan Plateau have created a very powerful monsoon system over India and South-East Asia. But this huge atmospheric sucking effect over the Indian Ocean also drew moisture away from East Africa, reducing the rainfall it experienced. Other global tectonic events are thought to have contributed to the aridification of East Africa. Around 3–4 million years ago Australia and New Guinea drifted north, closing an ocean channel known as the Indonesian Seaway as they did so. This blockage constricted the westward flow of warm South Pacific waters, and instead colder waters from the North Pacific flowed through to the central Indian Ocean. A cooler Indian Ocean reduced evaporation which in turn meant less rainfall for East Africa.3 But most significantly, another huge tectonic upheaval was happening in Africa itself that was to prove instrumental in the making of us.


About 30 million years ago a plume of hot mantle rose up beneath north-eastern Africa. The land mass was forced to swell upwards by about a kilometre4 like a huge zit. The skin of continental crust over this swollen dome stretched and thinned until eventually it began to rip open right across the middle in a series of rifts. The East African Rift tore along a roughly north–south line, forming an eastern branch through what is now Ethiopia, Kenya, Tanzania and Mali, and a western branch that cuts through Congo and then continues along its border with Tanzania.

This Earth-ripping process was more intense towards the north, tearing right through the crust to allow magma to seep through the long wound and create a new crust of basalt rock. Water then flooded into this deep rift to create the Red Sea; another rift became the Gulf of Aden. The seafloor spreading rifts tore off a chunk from the Horn of Africa to form a new tectonic plate, the Arabian. The Y-shaped meeting of the African Rift, Red Sea and Gulf of Aden is known as a triple junction and right at the centre of this intersection is a low-lying triangle of land called the Afar region, stretching across north-east Ethiopia, Djibouti and Eritrea.5 We’ll return to this important region later.

The East African Rift runs for thousands of kilometres from Ethiopia to Mozambique. As the swelling from the magma plume bulging beneath it continues, the Rift is still being pulled apart. This ‘extensional tectonic’ process is causing whole slabs of rock to fracture along faults and break off, with the flanks being pushed up as steep escarpments and the blocks in between subsiding to form the valley floor. Between about 5.5 and 3.7 million years ago this process created the current landscape of the Rift: a wide, deep valley half a mile above sea level and lined on both sides with mountainous ridges.6

One major effect of the swelling of this crustal bulge and the high ridges of the Rift was to block rainfall over much of East Africa. Moist air blowing over from the Indian Ocean is forced upwards to higher altitudes where it cools and condenses, falling as rain near the coast. This creates drier conditions further inland–a phenomenon known as a rain-shadow.7 At the same time, the moist air from the central African rainforests is also blocked from moving eastwards by the highlands of the Rift.8

The upshot of all these tectonic processes–the creation of the Himalayas, the closing of the Indonesian Seaway, and in particular the uplift of the high ridges of the African Rift–was to dry out East Africa. And the formation of the Rift changed not only the climate but also the landscape, in the process transforming the ecosystems of the area. East Africa was remoulded from a uniform, flat area smothered in tropical forest, to a rugged, mountainous region with plateaus and deep valleys, its vegetation ranging from cloud forest to savannah to desert scrub.9

Although the great rift started to form around 30 million years ago, much of the uplift and aridification happened over the past 3–4 million years.10 Over this time, the same period that saw our evolution, the scenery of East Africa shifted from the set of Tarzan to that of The Lion King.11 It was this long-term drying out of East Africa, reducing and fragmenting the forest habitat and replacing it with savannah, that was one of the major factors that drove the divergence of hominins from tree-dwelling apes. The spread of dry grasslands also supported a proliferation of large herbivorous mammals, ungulate species like antelope and zebra that humans would come to hunt.

But it wasn’t the only factor. Through its tectonic formation the Rift Valley became a very complex environment, with a variety of different locales in close proximity: woods and grasslands, ridges, steep escarpments, hills, plateaus and plains, valleys, and deep freshwater lakes on the floor of the Rift.12 This has been described as a mosaic environment, offering hominins a diversity of food sources, resources and opportunities.13

The widening of the Rift and the upwelling of magma was accompanied by strings of violent volcanoes spewing pumice and ash across the whole region. The East African Rift is dotted with volcanoes along its length, many of which formed in just the last few million years. Most of these lie within the Rift Valley itself, but some of the largest and oldest are growing on the edges, including Mt Kenya, Mt Elgon, and Mt Kilimanjaro, the tallest mountain in Africa.

The frequent volcanic eruptions spilled lava flows that solidified into rocky ridges cutting across the landscape. These could be traversed by nimble-footed hominins, and along with the steep scarp walls within the Rift may have provided effective natural obstacles and barriers for the animals they hunted. Early hunters were better able to predict and control the movements of their prey, constraining escape routes and directing them into a trap for the kill. These same features may also have offered vulnerable early humans a degree of protection and security from their own predators that prowled the landscape.14 It seems that this rough and varied terrain provided hominins with the ideal environment in which to thrive. Early humans, who, like us, were relatively feeble and did not have the speed of a cheetah or the strength of a lion, learned to work together and take advantage of the lie of the land, with all its tectonic and volcanic complexity, to help them hunt.

It is active tectonics and volcanism that have created and then sustained these features of a varied and dynamic landscape over the course of our evolution. In fact, because the African Rift is such a tectonically active region, the landscape has changed greatly since the times of earliest human habitation. As the Rift has continued to widen, the areas once populated by hominins on the valley floor have now become uplifted onto the flanks of the Rift; today it is here that we find hominin fossils and archaeological evidence, completely removed from their original settings. And it is this great rift, the most substantial and long-lived region with extensional tectonics in the world today, that is believed to have been crucial to our evolution.


The first indisputable hominin for which we have discovered good fossil remains is Ardipithecus ramidus, which lived around 4.4 million years ago in forest lining the Awash river valley in Ethiopia. This species was roughly the same size as modern chimpanzees, with an equivalent-sized brain, and teeth that suggest they had an omnivorous diet. The fossilised skeletons indicate they still lived in trees and had only developed a primitive bipedality–the ability to walk upright on two feet. About 4 million years ago, the first members of the genus Australopithecus–the ‘southern ape’–shared several traits with modern humans, such as a slender and gracile body-form (but still with more primitive skull shapes), and they were competent at walking bipedally. Australopithecus afarensis, for example, is well known from surviving fossils. One of these is the remarkably complete skeleton of a female who lived 3.2 million years ago in the Awash river valley, which came to be known as Lucy.

Lucy would have stood at only about 1.1 metres, but had a spine, pelvis and leg bones very similar to those of modern humans. So while Lucy, and other members of A. afarensis, still had a small, chimpanzee-sized brain, their skeleton clearly indicates a lifestyle of long-distance bipedal walking. Indeed, a bed of volcanic ash in Laetoli, Tanzania, has preserved three sets of footprints from 3.7 million years ago. These were probably created by members of A. afarensis and look remarkably like those you might leave in the sand during a stroll along the beach.

In human evolution, the development of bipedalism clearly came a long way before significant increases in brain size–we walked the walk before we could talk the talk. These Australopithecus fossils, together with those of the earlier Ardipithecus species, also show that bipedality didn’t evolve as an adaptation to walking in open, grassy savannah environments as had been thought previously, but first emerged with hominins still living closely among trees in wooded areas.15 But bipedalism certainly became an increasingly useful adaptation as the forests shrank and became more fragmented. Our early hominin ancestors were able to move between islands of woods, and then venture out into the grasslands. Bipedalism allowed them to see over the tall grass, and minimised the area of their bodies exposed to the hot sun, helping them to keep cool in the savannah heat. And the opposable thumbs that became so useful for holding and manipulating tools are also an evolutionary inheritance from our forest-dwelling primate ancestors. The hand crafted by evolution to grasp a tree branch pre-adapted us for holding the shaft of a club, an axe, a pen, and ultimately the control stick of a jet plane.

By around 2 million years ago the hominin species of the Australopithecus genus had all fallen extinct and our own genus, Homo, had emerged from them. Homo habilis (‘handy man’) was the first, with a gracile body-form similar to the earlier australopithecines and a brain only slightly larger.16 A dramatic increase in the size of the body and brain, as well as a major shift in lifestyle, however, came with Homo erectus, which appeared around 2 million years ago in East Africa. Below the skull, the skeleton of H. erectus is very similar to that of anatomically modern humans, including adaptations for long-distance running and a shoulder design that would have allowed the throwing of projectiles. They are also thought to have exhibited other traits shared with us, like long childhoods of slower development and advanced social behaviour.

H. erectus was probably also the first hominin to live as a hunter-gatherer and to control fire–not just for warmth but possibly also for cooking their food.17 They may even have used rafts to travel over large bodies of water.18 By 1.8 million years ago H. erectus had spread across Africa and then became the first hominin to leave the continent and disperse through Eurasia, probably in several independent waves of migration.19 This species persisted for almost 2 million years. By contrast, anatomically modern humans have only been around for a tenth of that time–and at the moment we’d be lucky to survive the next 10,000 years, let alone 2 million.

H. erectus gave rise to Homo heidelbergensis around 800,000 years ago, which by 250,000 years ago had developed into Homo neanderthalensis (the Neanderthals) in Europe and the Denisovan hominin in Asia. The first anatomically modern human, Homo sapiens


  • "Origins is a Big History, a grand synthesis that draws from many fields.... Mr. Dartnell's breezy style is full of word play, setting him far from the plodding crowd of many science writers."—Wall Street Journal
  • "Dartnell's approach is encyclopedic, marked by both a broad sweep and a passion for details."—Washington Post
  • "Dartnell's story is beautifully written and organized. His infectious curiosity and enthusiasm tug the reader from page to page, synthesizing geology, oceanography, meteorology, geography, palaeontology, archaeology and political history in a manner that recalls Jared Diamond's classic 1997 book Guns, Germs, and Steel."—Nature
  • "Fascinating."—The Guardian (UK)
  • "Behind the human brilliance that historians recognize in ancient Egypt, Mesopotamia, and Greece,
Dartnell discerns the effects of the plate-tectonic geology that created environments favorable to such
innovation. To Dartnell's acute eye, later periods of human history likewise reflect the geodynamics of an
evolving planet....Penetrating geoscience
delivers the surprising backstory of human history."—Booklist
  • "A thoughtful history of our species as a product of 4 billion years of geology.... Dartnell is an engaging guide through millions of years of history. An expert chronicle of the Earth that culminates in human civilization."—Kirkus Reviews
  • "Extraordinary book... Dartnell offers a new perspective on the relationship between human beings and their planet... Dartnell understands geology, geography, anthropology, physics, chemistry, biology, astronomy and history. That's quite an achievement, but what makes him special is the way he communicates the interconnectedness of these disciplines in a clear, logical and entertaining way...Superb."—The Times (UK)
  • "The perfect blend of science and history. This is a book that will not only challenge our preconceptions about the past, but should make us think very carefully about humanity's future. Five stars."—Mail on Sunday (UK)
  • "The central project of this book -- providing a geological take on human history -- is well illustrated and at moments, surprising."—Publishers Weekly
  • "A sweeping, brilliant overview of the history of not only of our species but of the world. Whether discussing the formation of continents or the role that climate (and climate change) has had on human migration, Lewis Dartnell has a rare talent in being able to see the big picture -- and explaining why it matters."—Peter Frankopan, author of The Silk Roads
  • "What a treat to see history through the eyes of an astrobiologist! Our history was shaped profoundly by the laying down of iron beds two billion years ago, by the tectonic forces that ripped open the African rift valley, by the slow cooling of the earth that began 50 million years ago, and by the evolution of grasses! Lewis Dartnell's absorbing new book shows, with many vivid examples, how deeply human history is embedded in the history of planet earth."—David Christian, author of Origin Story
  • "An original and timely way of looking at human history through the materials and natural resources that our species has employed to such effect. It should be read by everyone who ponders how long exploitation can continue on a finite planet."—Richard Fortey, author of Earth
  • "Endlessly enthralling, Lewis Dartnell explains why the history of humanity, and of human cultures, both take dictation from the deeper history of Earth herself--from broad generalities to surprisingly specific details. An entertaining and informative essay on contingency--and worthy successor to the writing of Stephen Jay Gould."—Ted Nield, author of Supercontinent
  • On Sale
    May 14, 2019
    Page Count
    352 pages
    Basic Books

    Lewis Dartnell

    About the Author

    Lewis Dartnell is a Professor of Science Communication at the University of Westminster. Before that, he completed his biology degree at the University of Oxford and his PhD at UCL, and then worked as the UK Space Agency research fellow at the University of Leicester, studying astrobiology and searching for signs of life on Mars. He has won several awards for his science writing and contributes to the Guardian, The Times, and New Scientist. He is also the author of three books. He lives in London, UK.

    Learn more about this author