Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. In response to climate change, a lot of animals—such as polar ...

California sea lions have managed to maintain -- and, in the case of males, increase -- their average body size as their population grows and competition for food becomes fiercer. This is in contrast ...

Carrying capacity is the idea that a given ecological niche can only support so many of a species within its geographical area. The number of California sea lions in certain areas of their habitat is ...

Male California sea lions are polygamous and must fight to defend their territories and their harems. Claire Fackler / CINMS / NOAA When a species grows more abundant, the animals typically become ...

A male California sea lion at Año Nuevo Reserve. (Photo by Ana Valenzuela Toro) California sea lion skulls used in the study were collected by the late Ray Bandar of San Francisco and are now in the ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. The idea that most biologically male members of a species are ...

DURHAM, N.C. -- Despite their fearsome fangs, male sabertoothed cats may have been less aggressive than many of their feline cousins, says a new study of male-female size differences in extinct big ...