Learn how through evolution, anglerfish developed a mating solution that helps them adapt to their extreme deep sea home.

A chipping sparrow perches on a caged bird feeder. This individual is in nonbreeding plumage. Note that it has a rather ...

Parasitism is a type of relationship between two species where one species, the parasite, benefits at the expense of the other, the host. When parasites cause disease in their host they are ...