Are UFOs real? How scientists think about aliens

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Are UFOs real? How scientists think about aliens
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A US congressional hearing has heard that not only are aliens real but the US government is secretly reverse engineering their aircraft. So have extraterrestrial beings been visiting our little rock? Science can’t directly answer those questions, but it can offer some guidance on how to think about them.

that stops civilisations colonising the universe; travelling faster than light may simply be impossible, making exploration relatively slow.If you hold a grain of sand at arm’s length up to the sky, that’s about the size of the area shown here. The glittering blobs are not stars, but entire galaxies, each containing billions of stars.Generally, astronomers think the universe does hold life, says Dr Brad Tucker, an astrophysicist at the Australian National University..

David Grusch, former National Reconnaissance Office representative on the Defense Department’s Unidentified Aerial Phenomena Task Force, told a congressional hearing the US government has alien aircraft in its possession.David Grusch, the US “whistleblower” who created a sensation when he told a US congressional hearing that a clandestine government program has retrieved UFOs and possible alien remains, has no photos, no documents, no ship and no bodies.

“He has shown no evidence at all, none whatsoever” to back his claims, says Mendham. “He makes passing references to having evidence, ‘But I can’t give it to you now’. Right, thank you very much,And we should not accept Grusch’s claims simply because he is a ranking officer on a UFO taskforce. Sceptics ask for the evidence rather than simply believing the word of a higher authority.

Venus can sometimes glow like an enormous star. Meteorites and space junk can burn up in the atmosphere. Satellites can catch the sun’s rays in unusual ways. “I’ve been seeing satellite flares for the better part of 30 years. A lot of people who have not might call it a UFO,” says Monash University astronomer Associate Professor Michael Brown. “So we’re pretty cautious with eyewitness reports.”because they can travel in other dimensionsThis is known as the “dragon in the garage” fallacy.

Liam Mannix’s Examine newsletter explains and analyses science with a rigorous focus on the evidence.

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