VideoJudith Mank: Why do we have sex? Evolutionary biologist Judith Mank explores the purpose of sex, and why its evolution can lead to males and females that look and behave differently. Video
LifeEarliest ever animal fossil is a 660-million-year-old spongeChemical evidence locked in rocks and oil suggests that the first animals were alive 100 million years earlier than we thought from fossilsNews