Add Yahoo as a preferred source to see more of our stories on Google. Contraception May Extend The Life of Some Mammal Groups by 10% A surprising new study has found that blocking reproduction in some ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.View full profile Rachael has a degree in Zoology ...

Oxytocin, a hormone already known for its role in childbirth, milk release, and mother-infant bonding, may have a newfound purpose in mammalian reproduction. In times of maternal stress, the hormone ...

As the generations dragged on past the 27th iteration, the birth rate began to silently collapse. By the 57th generation, a mere 0.6 percent of the cloned embryos survived. The 58th generation ...

Maddy has a degree in biochemistry from the University of York and specializes in reporting on health, medicine, and genetics. Maddy has a degree in biochemistry from the University of York and ...

Energy expenditure: a short history / Brian K. McNab -- Standard, cold-induced, and exercise-induced metabolism of rodents / Richard E. MacMillen and David S. Hinds -- Aquatic locomotion / Frank E.