Animal life may be far older than its most ancient fossils – here’s how we uncovered its hidden history
Frame Stock Footage/Shutterstock The question of when animals first evolved is one that has confounded scientists since the time of Charles Darwin. Studying rocks in north Wales in the mid-18th century, Darwin found the sudden first appearance of animal shells and skeletons in layers dating back over 500 million years perplexing. He had predicted a […]
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