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

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 ...

Scientists in Thailand have identified a new burrowing spider species, Damarchus inazuma, featuring a rare bilateral ...

In arid parts of central Australia, temperature plays a big part in determining whether central bearded dragon embryos emerge ...

Michigan State University scientists have pinpointed the molecular "switch" that supercharges sperm for their final sprint to ...

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 ...

In this article, we list some of the most common (and surprising) factors behind hair loss and how to manage them.

A massive male great white shark, Contender, has been tracked to the Gulf of St. Lawrence. This shark, measuring nearly 14 feet and weighing over 1,600 pounds, is the largest male ever tagged in the ...