How fast could T. rex go?

1. 1

   Tiny says

   A grown-up T. rex was about twelve metres long and very, very heavy. Moving all that weight takes a lot of stomping! Scientists think its top speed was around twenty-two kilometres an hour. Young T. rex may have been even quicker.

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   Checked against Tyrannosaurus (Natural History Museum Dino Directory)

2. 2

   Why couldn't a big T. rex go faster?

   Scientists built a T. rex inside a computer and asked it to run. They measured the push on its leg bones with every step. Running put so much force on those bones that they would have broken. So a big T. rex probably couldn't run at all, and walked instead.

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   Checked against Tyrannosaurus rex couldn't run, says new research (University of Manchester)

3. 3

   How can scientists tell how fast a dinosaur moved?

   Dinosaurs left trails of footprints in soft mud, and some of those trails turned to stone. Scientists measure the gap from one footprint to the next. That gap, called the stride, can sometimes show how fast the dinosaur was moving when it made those prints.

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   Checked against Dinosaur footprints: how do they form and what can they tell us? (Natural History Museum)

In Lil' Phil, reaching the bottom of this wonder earns a sticker for Tiny's collection.

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  Why did T. rex have tiny arms?

  Ages 4–11Tiny
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  How do we know dinosaurs were real?

  Ages 4–9Tiny