Up to 6% of women are born with extra breast tissue in their body.
In this vast and lonely universe, are Earthlings just desperate for next door neighbors to play with?
New York City will become the first city in the U.S. to require proof of vaccination for such activities.
Three periods of drought left an ancient watering hole littered with the bodies of horses, hippos and rhinos who gathered in search of moisture.
An immense stone that defined the sacred city limits of ancient Rome almost 2,000 years ago has been unearthed by construction workers in the historic center of the city.
From Borneo to Bolivia, here are just a handful of places around the world were deforestation has become a real problem
A Russian module accidentally pushed the International Space Station out of place. Now, a NASA flight director has revealed that the event was even more serious than initially reported.
Scientists have found one of the world's rarest chameleons again after fearing the species was extinct due to shrinking forests.
The infected chipmunks had no known contact with people.
One estimate suggests that 13 billion tons (12 metric tons) of ice made its way into the ocean on a single day.
Billions of years ago, a slowdown in Earth's rotation period lengthened days and offered photosynthesizing bacteria the chance to release more oxygen, transforming the planet.
Researchers from NOAA photographed a square, yellow sponge and pink starfish sitting next to each other on a rock over a mile underwater, leading to comparisons with cartoon characters SpongeBob Squarepants and Patrick Star.
A fizzled example of a gamma-ray burst, the most powerful kind of explosion known in the universe, suggests these outbursts can be surprisingly brief, researchers say.
Far-flung spacecraft are helping us learn about the solar system's edge.
Starting Monday (Aug. 2), you can find Saturn shining in the sky as part of a celestial phenomenon called opposition.
Here's why the nuclear bombs dropped in Japan left shadows of people on the ground and buildings.
Here's what happens inside Simone Biles' brain when the twisties set in. And for a gymnast like her, the disorientation can be dangerous, experts say.
Here's the highest temperature and humidity level that people can tolerate.
The outbreak has changed our understanding of the coronavirus delta variant.
The coronavirus delta variant may be as contagious as chickenpox and cause more severe illness than previous variants, CDC says.
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