A large international study reveals that mammals tend to live longer when reproduction is suppressed. On average, lifespan ...

The energy invested in animal reproduction is as much as 10 times greater than previously estimated when the metabolic load of bearing and caring for offspring is accounted for, according to a new ...

Some animals reproduce only once before dying. This life strategy, called semelparity, sees organisms channel all energy into reproduction. Mechanisms include stress hormone overload, sexual ...

Animals that can change their sex naturally might sound surprising at first, but in nature, it is simply another survival ...