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Ancient reptile footprints are rewriting the history of when animals evolved
Scientists in Australia have identified the oldest known fossil footprints of a reptile-like animal on a slab of sandstone recovered near Melbourne.
Per Erik Ahlberg shows a slab of sandstone found near Melbourne, Australia preserving fossil footprints from a reptile-like animal that lived around 350 million years ago. Per Erik Ahlberg shows a slab of sandstone found near Melbourne, Australia preserving fossil footprints from a reptile-like animal that lived around 350 million years ago. But the branch of the evolutionary tree that led to modern reptiles, birds and mammals – known as amniotes -- developed feet with nails or claws fit for walking on hard ground.
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