An Iranian archaeologist has discovered what he believes could be some of the oldest rock etchings on the planet. The markings, which have only been seen by a few people, were discovered by Dr Mohammed Naserifard among a rock formation outside the town of Khomeyn in western Iran. The professor believes etchings found at the top of an untouched hillside could be tens of thousands of years old.
We are living in the Anthropocene age, in which human influence on the planet is so profound – and terrifying – it will leave its legacy for millennia. Politicians and scientists have had their say, but how are writers and artists responding to this crisis?