In fact, social monogamy is extremely common in birds and somewhat common in mammals, while sexual monogamy is vanishingly ...

The animal kingdom mirrors our own in many ways, like how animals care for their young. Just as humans hire babysitters or ...

The development of DNA identification has given scientists potent new tools for discovering the genetic relationships between animal parents and their offspring ... birds' nests contain another ...

The path from the initial discovery of sex chromosomes in 1891 to an understanding of their ... the male beetles. Based on her comparisons of chromosome appearance in cells from male and female ...

While mammals are known for feeding milk to their young, some bird species ... doves are perhaps the best-known birds that produce crop milk. Both male and female members of the species contribute ...

Female birds are more vulnerable than males ... where extra-pair young have been shown to be more likely to be male, the mitonuclear incompatibility hypothesis was retrospectively tested.