Butterflies exhibit striking differences between males and females, a phenomenon called sexual dimorphism. These variations, ...

A lower percentage of males improves mating behaviour and feather cover, with similar reproduction results and higher ...

Researchers who analyzed data from zoo animals found that it is not only genetics, but mating pressures that may determine ...

Experts have identified the molecular trigger that powers sperm from idle to overdrive - a breakthrough in male fertility ...

Among mammals, females generally live longer. The recent comparative study examined 528 mammal species in zoos and found that 72% showed a female life expectancy advantage, averaging 12% longer lives ...

Sexual behavior is one reason why female mammals typically live longer than their male counterparts, according to a new study.

Across 1,000 species, males die younger than females—even in zoos. A global study shows biology, not just lifestyle, drives ...

Women usually live longer than men, and animals show the same pattern. Evolution, genes, and parenting explain why.

A new type of spider, male on one side of its body and female on the other, has been unearthed in a Thai forest and named ...

Across mammal species, from baboons and gorillas up to humans, females usually live longer than the males do. However, this ...

Defense Secretary Pete Hegseth in an address to the military’s top leaders waded back into a topic that nearly derailed his ...

In polygamous mammals with strong competition, males generally die earlier than females due to battling other males for a ...