Humans Appear
300,000 years ago, a species appeared in Africa with something no other animal had developed to the same degree: the ability to tell stories about things that don't exist. Gods. Nations. Money. Rights. This ability to share imagined realities allowed cooperation at scales nothing else could match. That was the beginning of everything that followed.
We were not alone
Homo sapiens are not the only humans who ever existed. At our peak, we shared the planet with Neanderthals (who lived in Europe and western Asia), Denisovans (known mainly from DNA found in a Siberian cave), and possibly other species. We interbred with them. Most people outside sub-Saharan Africa today carry around 2% Neanderthal DNA. We did not replace them cleanly — we merged with them.
The cognitive revolution
Around 70,000 years ago, something changed in human behaviour that shows up dramatically in the archaeological record — a sudden explosion of art, jewellery, complex tools, and long-distance trade. This is sometimes called the Cognitive Revolution. Humans began thinking symbolically: representing absent things, planning for distant futures, and creating shared beliefs that allowed strangers to cooperate.
Out of Africa
Modern humans spread out of Africa in multiple waves, reaching the Middle East around 130,000 years ago, Europe around 45,000 years ago, and Australia — requiring a sea crossing — around 65,000 years ago. By 15,000 years ago, humans had reached the tip of South America. We colonised every habitable continent on Earth using nothing but stone tools, fire, and language.
The universe looking at itself
Humans are, as far as we know, the first things in 13.8 billion years of cosmic history that have been able to understand the universe they are part of. We can trace the Big Bang, explain stellar evolution, decode DNA, and contemplate our own consciousness. The universe produced matter that can wonder about matter. Whether that is remarkable or terrifying probably depends on the day.
The cave paintings at Chauvet in France, dated to 36,000 years ago, show artists who were fully modern in their cognitive capacity — perspective, shading, movement, narrative. The paintings at Lascaux (17,000 years old) include what may be the earliest star maps. These artists had the same brains we have. The gap between them and us is not biological — it is accumulated knowledge. We are not smarter than our ancestors. We just know more things.