The ocean is thought to be be billions of years old and may contain as much as three times the volume of all the liquid water on Earth.
Build-ups of toxic gases in the atmospheres of many exoplanets in the "habitable zone" could limit the "safe zone" in which life outside our solar system could actually exist.
NASA's James Webb Telescope will open up an entirely new avenue for searching for extraterrestrial life.
Former Democratic Senator Harry Reid wants the U.S. to obtain UFO technology before China and Russia.
Scientists think life might survive on Proxima b, in spite of powerful lashings from its host star.
The scientists will study what's happening 3,000 feet below the ocean's surface, above what will one day become the newest island in the chain.
New disclosures from inside the Pentagon's Top Secret UFO program include the connection between aliens, poltergeists, extra dimensions and "bizarre creatures."
Where do they come from? How do they work? And of course, will they help us find aliens?
Can MUFON, the premiere UFO sightings and investigation organization, recover from a wave of resignations after a racist Facebook post?
Stronger gravity requires stronger—and pricier—rockets to overcome.
There are about 400 subglacial lakes around the world, but these are the first scientists believe to be salty.
Are we looking for aliens in the wrong way?
"I think people didn't really think about [phosphorus]" in comparison to ingredients like carbon and water, Greaves told Newsweek. "It's kind of a nice opportunity to go, 'Look, this matters and it's not super hard.'"
Are we really alone?
"I think that in this century we are going to be finding life beyond Earth," said Jill Tarter, a scientist at the SETI Institute research center in California.
"That's actually what I would expect them to find." NASA's quest for exterrestrial life may have a fungus problem.