Demographic and evolutionary dynamics in wild metapopulations are critically affected by the balance between dispersal and local adaptation. Where populations are demographically interconnected by ...

Insight into why females of some species undergo menopause while others do not has proven elusive despite an understanding of the biological mechanisms behind the change. However, new research ...

Many organisms compete for access to and acceptance by mates. In a recent study, researchers show that the sperm of Arctic char, a cold-water fish common to alpine lakes, swim at different speeds in ...

Animal mothers exhibit remarkable resilience and ingenuity when raising large litters. Species like the tailless tenrec and naked mole rat employ specialized adaptations, from numerous teats to ...

River turtles face immense challenges from predators and environmental factors from birth. Despite remarkable reproductive adaptations like sperm storage, human-induced threats such as habitat ...