How did tyrannosaurs walk?
Biomechanical reconstruction of a tyrannosaur in motion, showing skeletal structure.
Encyclopædia Britannica, Inc.
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© American Chemical Society (A Britannica Publishing Partner)The chemistry of mummies, ghosts, and vampires.
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Encyclopædia Britannica, Inc.The frequency and amplitude of sound waves as registered on an oscilloscope.
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Encyclopædia Britannica, Inc.You can say that all tortoises are turtles, but not all turtles are tortoises.
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© Open University (A Britannica Publishing Partner)Some spiders seem to “gallop” across the surface of water.
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Yosuke Kojima and Ibuki Fukuyama / Current Biology / thumbnail © Vince Adam/Shutterstock.comThis snake exhibits an unusual type of locomotion: a form of active rolling.
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Encyclopædia Britannica, Inc.Findings about a small bird have scientists rethinking dino diets.
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Encyclopædia Britannica, Inc.This dino makes you question both evolution and your gym routine.Media Editor: Lauren Sims
