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Although no extraterrestrial life has been found and life may still be just a rarity from Earth, there are scientific reasons to suspect that it can exist elsewhere, and technological advances that may detect it if it does. [152] Many scientists are optimistic about the chances of finding alien life.
Grey-skinned (sometimes green-skinned) humanoids, usually 1 m (3.3 ft) tall, hairless, with large heads, black almond-shaped eyes, nostrils without a nose, slits for mouths, no ears and 3–4 fingers including thumb. Greys have been the predominant extraterrestrial beings of alleged alien contact since the 1960s. [5] Hopkinsville goblin [6] [7] [8]
This category is for alien creatures reported in UFO conspiracy theories and urban legends, which are claimed by people who share these narratives to supposedly exist in real life. Subcategories This category has only the following subcategory.
The famous Drake equation allows us to estimate how many alien civilizations might exist in the Milky Way. It looks like this: N=R*(fp)(ne)(fl)(fi)(fc)L, with each variable defined below.
In February 2022, American futurist and science communicator Isaac Arthur discussed the odds against the time-traveler hypothesis on episode 23 Are Aliens Just Time Traveling Humans of the podcast It's Probably (not) Aliens, specifically debunking the concept as it was exposed on the ‘Time Travel’ episode of the Ancient Aliens series. [52]
What makes someone believe that aliens exist? Experts say there's more to it than many people think.
Listen up, conspiracy theorists – it is virtually impossible that there could be alien visitors on Earth. Internet jokesters call for people to storm Area 51 to find aliens – here's some ...
Intelligent civilizations exist, but we see no evidence, meaning f c is small. Typical arguments include that civilizations are too far apart, it is too expensive to spread throughout the galaxy, civilizations broadcast signals for only a brief period of time, communication is dangerous, and many others.