Study finds social media could alter teens' sleep patterns

New research finds age 13 is a turning point when bedtime screen use spikes, cutting into the sleep adolescents need most as they gain access to social media platforms.

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.

Life on Mars: What we know after NASA's announcement

NASA scientists say a rock sample collected by the Perseverance rover in Jezero Crater may contain the strongest signs yet of ancient microbial life on Mars, though more analysis is needed before drawing firm conclusions.

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.

Dozens of scientists cite errors in Energy Department climate change report

A group of scientists published a report challenging findings from a Department of Energy report that experts suggest obscure facts about climate change.

Some gel polish banned in Europe: Here's why

Bottles of gel polish that contain trimethylbenzoyl diphenylphosphine oxide will no longer be legal after Sept. 1 in the EU.

Trump announces new location for space command HQ

The president said that Huntsville will be "known from this point forward as Rocket City," after announcing that the U.S. Space Command headquarters is officially moving to Alabama.