It could mean a "negative" leap second.
Scientists have measured the shortest unit of time ever, the time it takes for a particle of light to cross a hydrogen molecule.
A new computer reconstruction of the tectonic plates of 60 million years ago reveals the existence of a lost plate called Resurrection.
New satellite imagery of California reveals not just the extent of its wildfire damage, but the depth of the loss.
The magnetic fields are more than a thousand times stronger than the magnetic field used in MRI machines..
Scientists aren't sure if space junk or a meteor caused a brilliant blue fireball seen across Western Australia.
European satellites are investigating the development of two distinct weak points within the South Atlantic Anomaly of Earth's magnetic field.
Taal volcano in the Philippines rumbled to life on Jan. 12, sending steam and sulfur skyward. Satellites have captured images of the eruption.
Earth's magnetic north is wandering from the Canadian Arctic toward Siberia, and it just crossed the Prime Meridian.
New calculations suggest that some black holes can grow hair, but they can't keep it for long. Alas, they go bald again.
A new model of the whole Earth shows how the mantle and crust drive the movement of tectonic plates as well as the creation and destruction of supercontinents.
It was only a matter of time: Amateur sleuths think they've tracked down the satellite that took a high-resolution image of the aftermath of an Iranian missile disaster.
The first-ever artificial intelligence simulation of the universe seems to work like the real thing — and is almost as mysterious.
A massive refinery explosion in Philadelphia was so hot and expansive that it was visible on weather satellites, according to the National Weather Service.