Mountaineer Garrett Madison has summited Mt. Everest 14 times. He says the world's tallest peak is no match for smaller, but harder climbs.
At least 7 stars in our galaxy have the potential to harbor advanced alien technology, researchers find
After surveying 5 million stars throughout our galaxy, researchers identified seven that may host Dyson spheres: super-advanced alien megastructures.
This ultrarunner was diagnosed with cancer 2 years ago, but didn't let it stop him. This summer, he'll run over 100 miles through Death Valley.
After completing chemotherapy treatment for cancer, ultrarunner Ray Zahab will run through Death Valley. He told us what keeps him motivated.
2 'potentially hazardous' asteroids will streak by Earth this week, one as big as a mountain. You can watch it live.
On Thursday and Saturday, two different asteroids will hurtle past Earth at close range. You can watch them both live.
A new carbon removal plant will absorb carbon dioxide 99,000 times faster than Earth's oceans
Cutting greenhouse gas emissions isn't enough. We have to start sucking CO2 from the atmosphere and companies like Equatic are leading the charge.
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A climber who summited the world's tallest peaks explains how he trains by keeping his body in Everest-mode
Mountaineer and Everest guide Garrett Madison just earned his second "triple crown," a rare climbing achievement. Here's how he stays in shape.
A team of climbers just summited 3 of the most challenging peaks in the world. They made it even harder by collecting roughly 2,000 pounds of trash along the way.
Mountaineer Garrett Madison has summited Mt. Everest 14 times and seen tons of trash accumulate over the years. So he decided to do something about it.
Jeff Bezos has a vision to colonize space with a trillion people. We asked experts to put it to the test.
Jeff Bezos dreams of a future where a trillion humans live in the solar system. But experts are skeptical.
A mysterious hole on Mars could be a jackpot of scientific discoveries, from extraterrestrial life to where astronauts could live
NASA's Mars Reconnaissance Orbiter imaged a hole on Mars in 2022 that recently resurfaced, reigniting the conversation about these mysterious features.
Scientists finally think they know where the most dangerous part of this US earthquake zone is and it's bad news for Washington
Scientists just released the first comprehensive survey of the Cascadia Subduction Zone, the most dangerous earthquake-producing fault in the US.
A mysterious Jupiter-sized planet that shouldn't exist is as puffy as a marshmallow and astronomers finally think they know why
"Super puff" WASP 107b confused scientists for years. Now, two independent teams of astronomers think they finally understand its mysterious origins.
Mexico City is just the beginning. Here are 11 other cities at risk of running out of water.
What makes a city most at risk of a water shortage isn't how much water it has access to. It's how that available water is managed and distributed.
Your back and neck pain might have nothing to do with your bad posture, a posture historian says
In her new book, "Slouch: Posture Panic in Modern America," Beth Linker traces the history of Americans' misguided obsession with posture.
A Texas coastal engineer says a simple home-buying decision saved his house from Hurricane Harvey — and could help other home-owners in flood zones
This year could the worst hurricane seasons in history, experts predict. A coastal engineer shares how he protected his home during Hurricane Harvey.
Taylor Swift's posture-correcting bra costs $185. A posture historian shares why she's skeptical of 'one-size-fits-all' solutions.
Beth Linker, author of "Slouch: Posture Panic in Modern America," says one-step posture-fixing products aren't the best solution
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This high schooler won $10,000 because he saw a mysterious outbreak killing sea turtles in his Hawaii hometown and decided to do something about it
Hawaii's green sea turtles are dying from mysterious tumors. Maddux Alexander Springer spent 400 hours diving and working with a lab to find out why.
2 teens won $50,000 for inventing a device that can filter toxic microplastics from water
Two 17-year-olds created a new device to successfully filter microplastics from water using ultrasonic sound waves and won $50,000 for their work.
The 10 states where your pet is more likely to get sick from tick-borne diseases, viruses, parasites, and more
Analysts ranked the 50 US states by risk of dog and cat diseases. Here are the diseases to watch out for where you live.
A 'cosmic glitch' in the universe is forcing astronomers to rethink Einstein's theory of relativity
Scientists have found evidence that Einstein's general theory of relativity doesn't quite work in the distant universe.
Astronomers say we may live at the center of a cosmic void 2 billion light-years wide that defies the laws of cosmology
If this gigantic cosmic void does exist, it could help astronomers solve one of the greatest mysteries of our universe.