LifeThe anus may have evolved from a hole originally used to release sperm The long-standing question of how animals came to have an anus may have been solved by studies of which genes are active during development in various animals News
LifeStone tools help monkeys thrive in hostile habitats Golden-bellied capuchins are usually found in humid forests, but some populations appear to have adapted to life in drier habitats with the help of stone tools News