What if the aliens are hiding from us? Hiding a whole planet is easier than you think.
How far back does the fossil record really go anyway? It might not be as far as you think.
As it turns out, life may not be limited to orbits around sun-like stars.
Canadian scientists studying water found deep in an underground mine have determined that the water is at least 1.5 billion years old, and maybe much older.
Around age 20, we begin to lose neurons to the process of aging. By 75, nearly one-tenth of the neurons you were born with have died.
A new discovery suggests that living organisms may exist in places that scientists never before dreamed possible.
Surgeons have pretty tedious jobs. One mistake could result in the death of a patient. How do these professionals prepare for such stressful situations?
Most people know about the mass extinction of the dinosaurs, but did you know there have been about twenty-three mass extinctions since life began on earth?
Could there be life on other planets? Given how unfathomably large the universe is, there very well could be.
Last time we mentioned the time when Soviet radio astronomers went public about listening in on radio signals from an alien civilization. As it turned out, what they were actually listening to was a quasar: the blazing core of a galaxy that can emit radio waves that fluctuate in a regular pattern. So regular, in fact, that people thought it was an alien intelligence. Learn more on this Moment of Science.