If correct, the new theory would mean these black holes would all have about the same mass.
Galaxy 12 billion light years away is spewing out stars 1,000 times faster than the Milky Way.
The world of flora has long been a source of cancer-fighting therapies. The drug paclitaxel, for example, originally came from the Pacific yew tree.
As Trump argues "we must have American dominance in space," Russia and China are attempting to stake their own claim to the final frontier.
Scientists discovered a new form of photosynthesis that could expand the search for alien life and help with genetically engineering crops to live in lower light conditions.
If only the dinosaurs had such technology.
The spacecraft's target is more than four billion miles away from Earth.
Some of the most stunning photos of the planets and moons in our solar system, including our own.
Astronauts Drew Feustel and Rocky Arnold will spend more than six hours outside of the ISS Wednesday.
Dead & Company, featuring Grateful Dead surviving members Bob Weir, Mickey Hart and Bill Kreutzmann, begins its North American tour on May 30.
Alan Shepard, Mercury 7 astronaut, had a long career with NASA that included being the first American to travel to space, landing on the moon and working as the head of the Astronaut Office.
Astronauts on the International Space Station do not even have sinks because of the way water behaves in microgravity.
The anti-satellite weapons are part of massive pushes to upgrade and update their militaries.
Tiangong-1 is on its way home with a vengeance, but can it really hurt you?
Space weather storms have happened since the birth of the solar system, and have hit Earth many times.
No worries—humanity will be long gone by the time the universe implodes.
Russia said the U.S. may risk "opening a Pandora's box" if it takes their military rivalry to outer space.