Global warming 500m years ago 'led to the start of the human race'
Sea temperatures of 25C helped fuel an explosion of life on Earth about 500 million years ago on Earth, according to scientists.
Global warming during a "greenhouse interval" ultimately led to the start of the human race, scientists believe.
New research suggests that sea temperatures of around 25C (77F) and a lack of permanent polar ice sheets fuelled an explosion of species diversity that eventually led to the human race.
Scientists made the discovery while looking for clues in tiny fossil shells in blocks of Shropshire limestone thought to be around 510 million years old.
https://news.sky.com/story/global-warming-500m-years-ago-led-to-the-start-of-the-human-race-11365329
