Several creatures that still walk the Earth today are closely related to dinosaurs.
Some of these early pterosaurs also may have had feathers, as thefound in Brazil revealed. But the line of pterosaurs didn’t result in any direct living descendants today — the Chicxulub asteroid drove pterosaurs to extinction.Other reptiles, besides birds, that still exist today, mostly predate dinosaurs on the evolutionary tree. Crocodilians are the most closely related group. They evolved before dinosaurs and experts put crocodiles in the larger family group, archosaurs.
In fact, crocodiles are more closely related to birds than they are to lizards and snakes, Gold says. This almost throws the outdated, but still widely believed, idea that birds are a separate species from reptiles, into a conundrum. As for lizards and snakes, they are closely related to each other, and both evolved earlier than crocodiles and dinosaurs. Experts still contest where the evolution of turtles fits in among these groups of reptiles. And the last remaining order of reptiles —Early Birds
While we can say that all birds are certainly dinosaurs, we can’t say that all dinosaurs were birds. Birds are classified as theropod dinosaurs — the same clade that includes species like
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