Some UFOs look unbelievably fast, but appearance and measured velocity are not the same thing. No verified case has yet forced physicists to abandon the light-speed limit.
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Could aliens ever visit Earth? An aerospace scientist unpacks the challenges of interstellar spaceflight
On May 22, 2026, the Pentagon released a second batch of previously classified photos and videos showing what appear to be unexplained flying objects. These file dumps were the culmination of a ...
Suppose an alien civilization discovers Earth and decides to investigate. Before it chooses a landing site or considers how to introduce itself, it faces a less dramatic question: how much mass should ...
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