Asteroid fragments upend theory of how life on Earth bloomed

Old cats’ brains show some of the changes seen in the brains of ageing humans.Credit: Getty To unlock the secrets of human ageing, researchers might do better to look to

On a warm, sunny beach near Melbourne, Australia, Alethea Jerebine watched her daughters scrambling up a jumble of rocks. “Can they do that?” she worried about her 10-year-old and 13-year-old.

A maneless lion from Kenya. Two maneless lions nicknamed the ‘Man-eaters of Tsavo’ preyed on railway workers in Kenya during the nineteenth century.Credit: Cavan Images/Alamy Hair found wedged in the