How much dark matter has gone missing since the Big Bang? New research suggests anywhere from 2 to 5 percent.
A new automated, flying ambulance completed its first solo flight, offering a potential solution for challenging search and rescue missions.
NASA's Dawn probe is snapping stunning new views of the dwarf planet Ceres as the spacecraft pushes ever higher above the small world.
A study of some old data from a 1990s-era particle-accelerator experiment could be a hint at new physics. Or it could be a fluke.
Many people in the U.S. were affected by a widespread internet outage early today due to a so-called DDoS cyberattack. How does this attack work, and what does it do?
The U-2 plane has a long and storied history that stretches back to the late 1950s, but how is the reconnaissance aircraft used today?
Though seemingly contrary to how it sounds, a "light-year" is a measure of distance, rather than time.
Scientists at MIT have developed a handheld device that can evaluate how ripe an apple is by measuring the glow of chlorophyll in the fruit's skin under ultraviolet light.
If recent findings on Earth are any guide, the oldest rocks on Mars may have signs of ancient life locked up inside.
But they may soon. Researchers have written a program that detects sarcastic people on social media and the internet.
Movies offer several examples of computers with human-like qualities, but the definition of artificial intelligence is complicated.