Calgary Zoo polar bear drowns after rough play incident

A necropsy has confirmed that a polar bear at the Calgary Zoo died after rough playing with another polar bear.

Surfer loses leg in fight with 10-foot great white shark

After the attack, Kai McKenzie managed to make it back to shore and his leg also washed ashore not long after.

Northern lights could be visible in Chicago this week

The northern lights could be visible in the Chicago area this week — so long as conditions are right.

Illinois doctor selected by NASA for Mars mission simulation

An Illinois doctor has re-emerged after spending a year inside a Mars simulation. He was among four U.S. researchers picked by NASA for the mission.  

Watch: Mountain goat shows off dance moves on top of Subaru

A hiker in Colorado walked back to her car only to find two mountain goats having a party on the roof of her Subaru without her.

Geomagnetic storm watch: Did you see northern lights auroras this week? Here’s why

A geomagnetic storm watch predicted northern lights visibility as far south as New York this week. Learn what caused this rare celestial event and its potential impacts.

NASA: No return date yet for astronauts aboard ISS

Two NASA astronauts aboard the International Space Station were supposed to come back to Earth in mid-June, but ongoing issues with their Boeing Starliner capsule have extended their stay.

Sharks test positive for cocaine off Brazil's coast

Sharks have tested positive for cocaine off Brazil’s coast, according to a new scientific study.

San Diego Zoo prepares to debut new giant pandas in August

Yun Chuan is known for his gentle demeanor, while Xin Bao is described as active, alert, witty, and an excellent climber.

Full buck moon to light up the sky this weekend: What to know

July’s full buck moon will be visible all weekend long if conditions in your area are conducive to stargazing. Here's what to know.