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T. rex running with mouth open, showing many teeth.

T. REX

Roar Mixer 

In movies, T. rex always has a ferocious roar. Did it in real life too? No one knows for sure. But scientists can study the closest living relatives of  T. rex , crocodiles and birds, for clues. And a giant animal like T. rex would have made lower-pitched sounds than smaller animals. So scientists study large living animals for clues too!

Mix your own T. rex roar by blending sounds from living animals.

1. Drag the sliders up and down to mix the sounds of different animals.
2. Use the pitch slider at the bottom to make the tone higher or lower.
3. Click the button to hear it roar!

Image Credits:
Black background, ©Marat/Toptal.com; T. rex by Zhao Chuang, Courtesy of PNSO.