The Decline and Fall of the Human Empire: Why Our Species Is on the Edge of Extinction

But if history bears witness to only one thing, it is to the seemingly endless ingenuity of life in general – and of Homo sapiens in particular – for getting itself out of trouble. They had been receiving other supplies in secret, too – a fact that only became clear much later. The date was initially subject to some debate but appears to have been corroborated by later evidence. Other evidence from artefacts in a cave in Mexico suggests an even earlier occupation, as long ago as 33,000 years ago.