Related topics: human evolution

Sign language orangutan dead at 39

Chantek, a male orangutan that learned to communicate in sign language, has died at the age of 39, a US zoo announced.

Millions of years of evolutionary history recorded in teeth

"Show me your teeth and I'll tell you who you are." These words, attributed to 19th-century naturalist George Cuvier, couldn't be more correct. The pearly whites we use every day over and over and over again are clues not ...

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