Radio waves are fast, but not fast enough to reach us before a civilization goes extinct.
Neil deGrasse Tyson doesn’t give an F about all this UFO talk.
The former Blink-182 star is getting renewed attention after revelations of the Pentagon's UFO research program.
The discovery opens up the tantalizing possibility that on other planets, life forms that need only atmospheric gas to survive exist, too.
A key version of an element could be a sign of life elsewhere.
NASA already explained the "concretion" phenomenon when a similar image made the rounds in 2014.
Saturn's Enceladus has become a prime search location for alien life as potentially habitable waters appear to flow beneath its icy crust.
Dark surface features on Mars reinterpreted by scientists two years after NASA announcement.
"Whatever this object is, I think there's a good chance it may not be a meteor at all."
The government claims not to be in the business of investigating UFOs. John Greenewald and many other researchers disagree.
Douglas Vakoch of METI announced messages were sent to the GJ273 system over three days in October.
Scientists at the NASA Goddard Space Flight Center called the flight a “breathtaking ride.”
China has become an alien-scouting superpower.