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Post-menopausal orcas are protective of their own sons well into adulthood, and stop them from getting into trouble, according to scientists.
A male orca's best friend is his old mother.By analyzing thousands of photos in a computer program, the team found males who lived with post-reproductive mothers had 35 percent fewer tooth rake injuries compared to males who lived with breeding mothers, and 45 percent fewer than those who lived without their mothers.
The bone of an ancient human relative shows signs of being cut with stone tools - by another human relative looking to cut off meat to eat.
Markings on a fossilized tibia make for a bloody ‘whodunnit’ 1.45 million years in the making.
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Telltale marks on a bone from an early human’s leg could be the earliest evidence of cannibalism