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The animal kingdom stretches anatomy far beyond human expectations. Some creatures carry organs that rival furniture in size, while others rely on structures so tiny they can only be seen through a ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The sensitive ...

Prehistoric people used a culinary method, similar to slow cooking today, to carefully extract animal teeth to use in decorative crafts, such as pendant-making, archaeologists have shown. It has long ...

Teeth first evolved as sensory organs, not for chewing, according to a new analysis of animal fossils. The first tooth-like structures seem to have been sensitive nodules on the skin of early fish ...

(CNN) — The sensitive interior of human teeth might have originated from a seemingly unlikely place: sensory tissue in fish that were swimming in Earth’s oceans 465 million years ago. While our teeth ...

They look the same in ancient and modern arthropods, because they’re all making this mineralized layer that caps their soft tissue and helps them sense the environment,” Haridy said. It’s likely that ...