The mummified remains of of a land-dwelling vertebrate are helping to reveal how early ancient reptiles began to take a breath with their whole chests — the breathing style used by modern reptiles, ...

Amphibians are a major clade of tetrapod vertebrates (class Amphibia) encompassing anurans (frogs and toads), caudates (salamanders and newts), and gymnophionans (caecilians). They are characterized ...

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