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 ...

Doctors in Brazil discover and confirm that a woman has blood with male chromosomes, a rare case of human chimerism.

The findings might overturn a widely held belief that only females pose a disease risk to people, though more research is ...

Tap dancing birds, shuffling spiders, and wiggling honeybees; dancing is not just a human phenomenon. Many types of animals ...

How long do reindeer live? In the wild, reindeer typically live up to 15 years of age. However, domesticated reindeer that ...

Female Asian elephant Bani was injured in a train collision at 9 months old. Over a year later, she's celebrating Christmas ...

Animals have adorable methods of expressing their love. While some enjoy tender cuddles, others go all out with dances.

The textbook version of the "Out of Africa" hypothesis holds that the first human species to leave the continent around 1.8 ...

If you’ve ever joked that dating is killing you, science may have just backed you up. According to a massive new study, ...

From an incredible series of revelations about the ancient humans called Denisovans to surprising discoveries about tool making, this year has given us a clearer picture of how and why humans evolved ...

In a small study, pet cats greeted male owners with more vocalizations than they did female caregivers. By Clarissa Brincat As he lectured on animal behavior, Kaan Kerman, an instructor in the ...