Are we really alone?
"We have no idea what's behind these weird incidents because we're not investigating," Christopher Mellon said.
Radio waves are fast, but not fast enough to reach us before a civilization goes extinct.
If we keep making satellites at the current rate, nearby planets could spot us by 2200.
Michio Kaku believes some of us might live to see the day that aliens finally make contact.
The state is welcoming all aliens and alien-seekers with a fresh itinerary.
The video went viral on Thursday.
There is indeed evidence of an ancient ocean on Mars, but seashells and a sphinx? Not so much.
No one and nothing was safe this year.
The SpaceX founder joked with confused Twitter users saying his Falcon 9 rocket was a nuclear alien UFO from North Korea.
Neil deGrasse Tyson doesn't give an F about all this UFO talk.
Metalworkers in the ancient world would hunt for iron from meteorites to create rare weapons and artefacts.