HumansWhen did human ancestors start walking on two legs? Anthropologists have been arguing for 20 years about whether Sahelanthropus, a hominin that lived about 7 million years ago, was one of the first bipedal apes News
LifeHuge nose of male proboscis monkeys is key to mating success Male proboscis monkeys use their enormous noses to make loud trumpeting sounds, and the organ’s size advertises their health and status to prospective mates and rivals News