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T-Rex

Image: Tyrannosaurus rex adult and young

Scientists have long debated the speed and agility of this prehistoric giant. While some propose that T rex. was capable of nothing more than a leisurely jog, other investigations have shown that the six-ton (5.4-metric-ton) predator could possibly have outrun an Olympic sprinter, reaching a top speed of 18 miles an hour (29 kilometers an hour).

Illustration by Michael Skrepnick

Tyrannosaurus Rex Profile Page