Natalie Wolchover

UFO researchers say that new telescope footage showing a coronal mass ejection blasting Mercury has unveiled a "cloaked" spaceship parked near the planet.

A piece of metal debris has crashed through the roof of a Massachusetts furniture warehouse. The FAA is investigating what it fell from.

An amateur astronomer has taken a photo of the circumstellar disk around Beta Pictoris, a young star. The photo has wowed professional astronomers.

Unidentified falling objects, or UFOs, are getting in the way of the particle beam at the Large Hadron Collider at CERN. Physicists are trying to figure out what they are.

A new study suggests that Europa, Jupiter's icy moon, may be even more suitable for life than previously thought.

Life's Little Mysteries consults experts about the strange structures and patterns found in the desert in China on Google Earth. Turns out they're for spy satellites.

The faint glimmer of stuff emitted by black holes is called Hawking radiation. It's made of particles that escaped by way of quantum tunneling.

A time-lapse video that strings together photographs taken by space station astronauts shows Earth in all its glory.

NASA says asteroid 2005 YU55 will come slightly closer to the moon than the Earth, but it poses a threat to neither.

A new sleep study has shown that realistic, scary alien encounters and abductions can be dreamed up.

The annual Orionid meteor shower will peak in the pre-dawn hours of Saturday, Oct. 22.

A German telescope called ROSAT is falling to Earth this weekend. Scientists say there's a 1-in-2,000 chance it will hit someone.

You're about a million times more likely to get struck by lightning than a falling satellite, rocket stage, or other space debris.

Astronomers have discovered a circumbinary planet that orbits two stars, like the fictional planet Tatooine in Star Wars.

Scientists engaged in the search for extra-terrestrial intelligence will aim their telescopes at the newfound super-Earths soon, and hope to detect alien signals.

The Harvest Moon looks red because of the filtering effects of the atmosphere. It's big because of a little-understood optical illusion.

The moon looks very different from the top down. NASA's Lunar Reconnaissance Orbiter has captured thousands of photos of our satellite's north pole region.

Could NASA really launch a secret lunar mission as the new film "Apollo 18" implies? Historians think not.

New research fleshes out a scenario in which intelligent ET life detects Earth's spectral changes due to greenhouse gas emissions, sees humans as a threat and kills us.

Political issues may be the biggest hurdle when humanity is faced with tough decisions about how best to deflect an earthbound asteroid.

Solar flares are classified on a logarithmic scale according to energy levels.

NASA scientists have just announced that there might be liquid water on the surface of Mars. Here's why they think so, and why it matters.

Scientists are stumped on how this twisted gas ring can exist.

Thad Roberts went to prison for seven years for stealing moon rocks from NASA. We asked him about his crazy stunt and his bold new physics theory that came out of it.