Before solving that mystery, however, astronomers must determine how quickly those distant planets are truly spinning. Slower ...

Earth’s neighbor still has secrets that science is trying to figure out, and one of them is potential signs of life.

New models suggest that Ceres, the asteroid belt's largest object, once had a radioactive core that could have sustained life ...

Given the size and age of the universe, it should be full of species with technology far more advanced than our own. But so far there is no trace ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists say tiny exoplanets smaller than Mars simply can't hold an atmosphere long enough for alien life to survive. ©Image ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration of an exoplanet in an alien star system. New research suggests that radio emissions from intelligent aliens may be ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. The Milky Way galaxy has more than 400 billion stars in it. Over the last few decades, ...

English science fiction writer Arthur C. Clarke once said, “Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.” It’s a line that has motivated ...

A NASA rover image of a rock formation on Mars resembling a doorway has sparked speculation about alien life, though experts ...

Do aliens exist? Could Earth really be the only planet hosting intelligent life? Debates over the existence of extraterrestrials date back to the earliest Indigenous and western thought. The tools ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life. Tardigrades—a type of invertebrate ...