What's in a single second? An awful lot, depending on when and where you are in the universe. CNET's Eric Mack ponders the value of Tuesday's extra leap second.
The permanent, turbulent colossal storms at Saturn's poles are a mystery -- but a new model may explain what causes them.
The private space-exploration company's passenger capsule roars away from Cape Canaveral Wednesday in a test of its system for boosting a crew to safety in an emergency.
Photographer Gavin Heffernan turns his lens on the night skies from two US national parks to make an awe-inspiring video that looks like something out of a fantasy novel.
Prepare yourself for a tiny bit more summer. We won't get a leap year until 2016, but this year we will get an extra second.
NASA's Juno spacecraft records footage showing how our planet and its satellite would look if visiting UFOs had really low-res cameras.
Scientists have taken new measurements that suggest that the core of the Earth burns at 6000 degrees Celsius — as hot as the surface of the sun.
A giant space rock plans on making an appearance in our stellar neighborhood, but it's not as bad as you might think.
Photographer Ben Cooper joined a crew aboard a flight from Bermuda to chase the rare hybrid solar eclipse as it sped across the Atlantic Ocean toward western Africa.
Wednesday's Doodle remembers the 194th birthday of French physicist Leon Foucault, who devised a pendulum to explain the earth's rotation.