Before the start of the 2020s, almost anyone who admitted to a belief in UFOs (unidentified flying objects) or extraterrestrial visitors was dismissed as a crackpot. Yet since the start of the decade, ...

There’s nothing like a little trouble at home to make you look for greener pastures. And green or not, aliens were everywhere in 2023. Well, at least in the news. From Unidentified Anomalous Phenomena ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. If Earth’s ...

Events in our skies and beyond the reaches of Earth's atmosphere dazzled, amazed and sparked plenty of wonder this year. The enigmas of outer space and the distant planets that populate it have, of ...

Up until the mid 1990s, astronomers didn't know for certain if there were any planets outside of our own solar system. But ever since the first exoplanet was discovered, it’s been increasingly clear ...