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 51¶¯Âþ
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 51¶¯Âþ