The U.S. government will officially investigate UFOs with a new office based in the Pentagon.
The mysterious presence of mantle materials more than 1,000 miles (1,609 km) from where they originated may be explained by a 'window' 62 miles (100 kilometers) below the Earth's surface.
The artificial intelligence (AI) program DeepMind has gotten closer to proving a math conjecture that's bedeviled mathematicians for decades.
After speeding up during 2020, the Earth's spin had settled down. A negative leap second may still be needed in the next decade.
The melting of Earth's polar ice is warping the planet's crust. Here's how that's linked to climate change.
The winning photographs for the 13th annual Astronomy Photographer of the Year awards have been announced, and the sun is the star of the show.
Here's a look at stunning astronomy images from the Royal Observatory Greenwich's Astronomy Photographer of the Year competition.
A six-year search of space beyond the orbit of Neptune has netted 461 newly discovered objects, including four that could shed light on Planet Nine.
A new freely downloadable universe simulation reveals the structure of galaxies and galactic clusters over more than 13 billion years of history.
The Greenland ice sheet, nearly 2 miles thick in places, hides a landscape of canyons, mountains, fjords and gem-like lakes.
A fireball streaked across North Texas last night, leading to several hundred witness reports of a bright flash and sonic boom.
A meteorite found nestled in a horseshoe imprint in England was formed in the early days of the solar system and may contain the building blocks of life.
NASA scientists have mapped the dynamic, ever-shifting lakes beneath Antarctica in more detail than ever before.
The best astronomy photos of 2021 invite the eye upward and outward, bringing stunning views such as auroras above Earth and visions of a stellar nursery
The planet has been losing 33,000 square miles (87,000 square kilometers) of ice coverage each year since 1979.
A severe drought going into the summer is setting up the western United States for water rationing and nasty wildfires.
A gorgeous new image of Westerlund 2 shows a birthplace of new stars in the Milky Way in unprecedented detail.
A new visitor is swinging by the solar system: a never-before-observed comet that hails from the Oort Cloud.
Speaking on the BBC show 'Panorama,' Microsoft's Brad Smith warned that unless checks are put in place, artificial intelligence could lead to a dystopian future
Satellite observations of different climate variables don't quite add up, suggesting these measurements might be missing something about the atmosphere.
A rare type of plutonium has been found in the crust below the deep sea, offering new clues as to how heavy metals form in star explosions and mergers.
The permanent oxygenation of Earth's atmosphere took twice as long as previously believed and finally finished up to 100 million years later than expected.