Otzi, a 5,000-year-old mummy, has 61 tattoos arranged in 19 groups across his body. Researchers used a unique camera sensitive to invisible light to discover the exact number and location of all of ...
Crows remembered the face of a person they considered a threat—even across generations. Researchers caught, tagged, and released crows to see if they can recognize the face of a person who’s a threat.
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