Yellowstone National Park trail shut down after first bear attack in 4 years

Grizzly bears and black bears coexist in Yellowstone, according to the National Park Service, and it's unclear which one was involved in the attack.

Study reveals pre-CTE damage in brains of even young contact-sport athletes

An NIH-funded study of athletes under 51 found repeated head impacts can cause early neuron loss and brain inflammation years before CTE is detectable.

Rocks found by NASA's Mars rover offer strongest hints yet of past life

Rocks found on Mars may provide the strongest evidence yet of past life on the Red Planet, but more testing is needed to back up those findings.

Hikers on psychedelic mushrooms rescued after getting lost in NY mountains

A hiking trip took a “trippy" turn that ended with a group having to be rescued from a popular mountain destination in New York State last month.

Arkansas man, 72, mauled by 70-pound bear

The man suffered extensive injuries to his face and upper body before being airlifted to a hospital.

Man dies in shark attack at Sydney beach

A man in his 50s was killed by a large shark while surfing at a beach near Sydney, Australia on Saturday.

Total lunar eclipse coinciding with this weekend’s full moon

This month’s full moon coincides with a lunar eclipse – but it unfolds on the opposite side of the world Sunday night and early Monday.

Rare manatee sighting in Texas temporarily halts $64 million construction project

According to the Texas Marine Mammal Stranding Network, sometimes West Indian Manatees migrate from Florida to Texas in the summer. These sightings are still rare.

Northern Lights could be visible in New York on Monday

Eyes to the sky! New York residents could catch a rare glimpse of the glowing Northern Lights to start off the week.

See it: Photos show glowing baby planet outside of our solar system

Astronomers have, for the first time, detected a planet growing inside a cleared gap of a protoplanetary disk, confirming long-held theories about how young planets shape their star systems.

Wildlife Photographer of the Year sneak peek: See the stunning photos

A dramatic stand-off between a lion and a cobra. A lone elephant wading through a landfill in Sri Lanka. Here's a sneak peek at the Wildlife Photographer of the Year's top photos.

Watch: Video shows rare fish's ability to climb rocks

The tiny fish were seen swimming, or rather "climbing" up rocks, a behavior that hadn't been seen before.