This is it! Scientists have finally found definitive proof of an advanced alien civilization of incredible power!
Since time slows down the closer you get to the speed of light, if alien spaceships could travel at light speed, wouldn't they take longer to get places?
Did UFOs attack fighter planes in June of 1969? Find out on this Moment of Science.
Are there really alien civilizations out there that we don't know about? Find out on this Moment of Science: "The Fermi Paradox".
Have scientists solved the mystery of Stonehenge? Find out on this Moment of Science: "Surprise at Stonehenge".
Could aliens come down to earth to eat us? Find out on this Moment of Science.
E. T. phoned. Now what? Learn about the earth's response to alien contact on this Moment of Science.
If E.T. does try to phone us how will we know it? Find out on this Moment of Science.
Do you think you've seen a ghost, or an alien, or God? Or have you had an out-of-body experience? Learn more on A Moment of Science.