"If a signal gets broadened by its own star's environment, it can slip below our detection thresholds, even if it's there." ...

Ever since physicist Freeman Dyson first proposed the concept in 1960, the "Dyson sphere" has been the holy grail of ...

Looking for molecular evidence of life on other worlds is tricky, but a test based on the reactivity of carbon compounds ...

Beyond that, in the decades to come, we might be able to see the colours of an exoplanet’s surface, and determine if plant life might be present there. And then we can search for changes in a planet’s ...

If you think auroras on Earth are a strange and mesmerizing sight, that's nothing like what occurs on the perplexing world of Uranus.

One obstacle to figuring out why, exactly, parts of the American government have developed a strange fascination with “unidentified aerial phenomena” and “nonhuman intelligence” — in lay terms, ...

President Trump on Thursday said he will direct the Department of Defense and other agencies to release its files about UFOs and “alien and extraterrestrial life” to the public. “Based on the ...

“They’re not being kept in Area 51,” Obama said. “There’s no underground facility — unless there’s this enormous conspiracy and they hid it from the president of the United States.” Obama’s comments, ...

Former President Barack Obama said he did not see evidence that aliens "have made contact with us," after sending social media abuzz by saying aliens were real on a podcast over the weekend. During a ...

WASHINGTON — He needed more space and time. Former President Barack Obama has clarified his casual but dramatic claim that aliens are “real,” caveating that he never came across solid evidence of ...

Former President Barack Obama said Monday that recent comments he made appearing to confirm the existence of aliens were made "in the spirit of the speed round." "Statistically, the universe is so ...