Many bird species are monogamous. However, genetic studies have shown that the social partner is often not the genetic father of all offspring. Some studies found biased sex ratios: more males than ...

Ultimately, the widespread occurrence of SSSB in mammals, especially primates, strongly suggests that such behaviors are ...

P rimates are a group of mammals that includes humans and our close relatives, such as apes, monkeys and lemurs. Monkeys, ...

Differences among the DNA of seven ape species—including humans—are greater than originally thought, according to an ...