The Prehistoric Giants Hall of Fame- page 8 | Science | Smithsonian
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(Raul Martin)

The Prehistoric Giants Hall of Fame

What were the largest species of all time? Does the Tyrannosaurus rex make the list?

Largest crocodile

Crocodile
(Raul Martin)
During the time of the dinosaurs, there were at least two crocs that grew to monstrous sizes worthy of a B-grade horror movie. Sarcosuchus, a roughly 110-million-year-old reptile, reached lengths of about 40 feet. Its narrow snout hints that it ate fish and relatively small fare. Another predator rivaled it in size: Deinosuchus, a roughly 40-foot-long creature that lived 80 to 73 million years ago and was a cousin of modern alligators. From tooth-marked remains, we know that this ambush predator ate dinosaurs.

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