HumansPeople living 100,000 years ago spent time collecting crystals Humans living 100,000 years ago in what is now the Kalahari desert spent time collecting crystals, challenging the idea that human behaviours like symbolism emerged along coasts 51¶¯Âþ
HumansWhy insulting people's intelligence is incompatible with open debate We too often turn to insulting people’s brain power – and that closes off our ability to understand others, argues Melanie Challenger Comment