Tiny clawed tracks left in ancient mud are the oldest reptile footprints
By Ashley Strickland, CNN (CNN) — Distinct clawed footprints found on a slab of 356 million-year-old rock from Australia suggest that reptile relatives appeared between 35 million and 40 million years earlier than previously believed. The tracks also push back the origin of amniotes, a group that includes reptiles, birds and mammals, and provide new
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