A hybrid species of all-female fish in the north Pacific Ocean may have survived for an uncharacteristically long period of time by switching mating species, say scientists. A hybrid species of ...

Most systemic autoimmune diseases occur more frequently in females than in males. This is particularly evident in Sjögren’s syndrome, systemic lupus erythromatosis (SLE) and thyroid autoimmunity, ...

A team of researchers recently discovered the kunga as the earliest example of human animal hybrid breeding. The animal was a cross between a female donkey and a male Syrian wild ass and was used to ...

The aggressive behavior displayed by some (but not all) female Wistar rats when an unfamiliar rat is being introduced into their home cage (the resident intruder paradigm) was found to be higher in ...