Brookfield Zoo Chicago's rescued axolotl
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Brookfield Zoo Chicago is inviting the public to help name one of its most charming residents. (Video: ? Brookfield Zoo Chicago)

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.

Expert explains how warm, dry weather could impact Chicago?s fall colors
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Dr. Christy Rollinson from The Morton Arboretum explains how drought and late-season heat may cause trees to drop leaves early and change the timing of peak fall foliage.

NASA?s perseverance rover finds possible signs of life on Mars ? But proof may take years
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NASA?s Perseverance rover has spotted intriguing chemical fingerprints in Martian rock that could hint at ancient microbial life. The potential biosignatures, discovered in a clay-rich lakebed, can?t be confirmed with the rover?s instruments alone ? meaning the answer may have to wait until samples return to Earth.

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.

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.

Chicago forests dominated by invasive shrubs that threaten wildlife | ChicagoNOW
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Across the Chicago region, nearly 80 percent of our forests are now dominated by invasive shrubs like buckthorn and honeysuckle, but new research and ongoing restoration efforts are offering hope for turning things around. The Morton Arboretum's Lindsay Darling explains more about the efforts.

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.