For the first 1.5 million years after the invention of the handaxe, there was little improvement in stone technology. This represents more than 80 per cent of the time since Homo erectus crafted the first handaxe near Lake Turkana, Kenya, 1.76 million years ago. It is impossible to conceive how long this is – how many humans decided to make a handaxe, to use it, to throw it away, and never to imagine that there might be a better way to make cutting tools.