A groundbreaking new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions ...

The traveler now faces charges. Authorities make startling discovery in airport after inspecting passenger's luggage — here's ...

A new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions of years ago in ...

As herds rely on fewer replacement heifers, the stakes for getting each one pregnant at the right time are higher than ever.

Countries under the international treaty to protect migratory animals have proposed increasing protections for 42 species.

With calves weaned, veterinarians criss-cross the country conducting pregnancy checks, or preg checking, cow herds. The vet ...

Some animals reproduce only once before dying. This life strategy, called semelparity, sees organisms channel all energy into ...

Meet animals that grow for a lifetime, sometimes for centuries, and discover why dinosaurs did not, despite their huge size.

Find out which animals live the longest and what clues this gives us for potentially slowing down human aging.

Life expectancy across 117 mammals was increased by hormonal contraception and surgical sterilization in new study.

Males engage in a two-week-long sex marathon with as many females as they can find. Each frenzied encounter can last up to 14 ...

In 1989, paleontologist Darren Tanke suggested that similar breaks were the result of mating as one dinosaur mounted the ...