It’s one of the most popular themes in science fiction—top secret government experts are ready to spring into action if a UFO appears. For example, in the novella-based 2016 film Arrival, the ...
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. If Earth’s ...
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, ...
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 ...
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