This Nearly 300-Million-Year-Old Mummified Reptile Reveals the Evolutionary Origins of How We Breathe Unusually well-preserved fossils have provided the earliest known evidence of a land vertebrate that could pump air in and out of its chest using muscles between the ribs—the same strategy used by modern mammals, reptiles and birds

This Nearly 300-Million-Year-Old Mummified Reptile Reveals the Evolutionary Origins of How We Breathe: Unusually well-preserved fossils have provided the earliest known evidence of a land vertebrate that could… @SmithsonianMag #Fossils #Evolution #Paleontology #MummifiedReptile #BreathingOrigins