T. rex often gets made fun of for its relatively tiny arms, but we wouldn't laugh if we saw them up close. Each arm was three feet long—bigger than a man's leg—and their muscles were incredibly strong. Scientists have theorized that the dinosaur used its arms to push itself off its stomach, or perhaps to hold onto females during mating.
Could You Arm Wrestle A T. Rex?
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Key Facts In This Video
Dinosaurs were not the first reptiles. 00:14
Humans can curl a maximum weight of about 118 kg (260 lbs), whereas T. rex could curl 195 kg (430 lbs). 01:45
Tyrannosaurus existed closer in time to your parents than it did to the Apatosaurus. 03:11