Are we alone in the universe? Live Science follows the researchers trying to answer that question and reports on what we've learned about aliens. From how scientists search for extraterrestrial life and whether the U.S. government is hiding evidence of "non-human intelligence" to the strange, scientific excuses for why humans haven't found aliens yet and the disturbing reason why aliens may never have visited Earth, our expert writers and editors tackle it all with the latest news, features and articles about extraterrestrial life.
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Latest about Extraterrestrial Life
Did the James Webb telescope really discover aliens? The truth about K2-18b.
A study suggesting the exoplanet K2-18b shows potential signs of alien life has been met with skepticism from the scientific community. Here’s the truth about what the James Webb Space Telescope saw.
Dyson spheres could really exist — but there's a catch
Is it possible to build a Dyson sphere that isn't catastrophically unstable? New research says yes, but only in one type of star system.
Intelligent aliens would need a power supply to jump-start their civilization — would they require fossil fuels?
Fossil fuels powered the industrial revolution. Would aliens need a similar power source to jump-start a technical revolution?
Extraterrestrials quiz: Are you an alien expert, or has your brain been abducted?
Quiz Try this aliens quiz and see how much you know about our interstellar neighbors — if there are any.
If life can exist in your stomach, it can exist on Mars. Here's what it might look like.
If life exists on other planets, it needs to be adaptable to extreme environments. To get a clue of what it might look like, we can turn to a surprising place: the human gut.
'Perhaps it's only a matter of time': Intelligent life may be much more likely than first thought, new model suggests
For decades, scientists assumed that life on Earth emerged through a chain of highly improbable flukes. But a new theory suggests it may have instead arrived just in time.
The existence of intelligent aliens is 'highly likely' — and they could await in our own galaxy
According to astronomers, there are approximately 200 billion trillion stars in our observable universe — chances are, there’s life out there somewhere.
Did people report seeing UFOs before the 20th century?
Are UFO sightings a 20th-century phenomena, or did people report seeing them earlier in history?
