This video dives into the world of animals with the most unusual and astonishing breeding habits on Earth. Scientists reveal ...

Science history: Dian Fossey found murdered, after decades protecting gorillas that she loved — Dec. 27, 1985 This 18-mile ...

Each year on the Serengeti, hundreds of thousands of wildebeest calves are born within weeks. Here's how the young predators ...

At three sites where turkeys are hunted, it appeared that females were more likely to give birth to other females.

Understanding the evolution of insect mating behavior is essential for explaining how early insects adapted to life on land.

Rarely do species presumed extinct reappear with renewed hope for a better future. But researchers in Australia not only ...

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

Notable: Seattle is up to 54% to earn the No. 1 seed after beating the Panthers on Sunday, according to The Athletic's playoff predictor. If they beat the Niners on Saturday night, they'll win the No.

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 ...

The Real Wild West is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, ...