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There is no known evidence for the existence of extraterrestrial life forms similar to humans, but many theorize that they exist.
A new microorganism recently discovered by NASA, which is able to thrive and reproduce using the toxic chemical arsenic, gives more plausibility to the theory that other planets might sustain life.

en.wikipedia.org/wiki/Extraterrestrial_life

Extraterrestrial life, also called alien life is life that does not originate from Earth. These .... Alien life, such as microorganisms, has been hypothesized to exist in the .... There is evidence that Mars had a warmer and wetter past: dried-up river ...

heatst.com/tech/weird-unexplained-phenomenon-may-be-proof-that-aliens-are-jetting-around-space

Mar 12, 2017 ... A team of Harvard scientists is now considering the possibility that signs of alien life may have been out there all along. Astrophysicists at the ...

www.thesun.co.uk/tech/2692554/are-aliens-real-these-unsolved-space-mysteries-could-prove-existence-of-extraterrestrials

Jan 24, 2017 ... Do aliens exist or are humans totally alone? ... real until they get in touch with us or we find evidence of their existence. ... Is there life on Mars?

www.nbcnews.com/id/28148553/ns/technology_and_science-space/t/six-frontiers-alien-life

With so many stars, alien life is probable; Water worlds abound in our solar system ... Shostak notes that there is no direct proof for any life beyond Earth, but the ...

www.history.co.uk/topics/show-article/do-aliens-exist-most-compelling-evidence-alien-existence

Most compelling evidence of alien existence ... There are more registered sightings of UFOs than there is the word count here to deal with them and the majority ...

www.history.co.uk/shows/ancient-aliens/articles/do-aliens-exist-most-compelling-evidence-of-alien-existence

Storage Wars. Find out more · Ancestry - Single MPU · Counting Cars. New episodes weeknights 8pm · Forged in Fire. Thursdays at 9pm · American Pickers.

www.express.co.uk/news/weird/785923/The-Disclosure-Activists-aliens-exist-government-top-secret-cover-up-truth-embargo

Mar 31, 2017 ... EXCLUSIVE: World is 'about to be told ALIENS EXIST and are HERE .... to organisation, added: "All of the evidence that has been accumulated by ... The Crop Circles are often believed to be created by aliens, as there is no.

thehairpin.com/proof-that-aliens-exist-finally-18747ba9618b

Nov 21, 2016 ... Good day, Earth. Did you enjoy your Earth “coffee” this morning? Did you have a good Earth “eggo® with peanut butter on it”? Was the ...

www.thealternativedaily.com/five-recent-signs-of-aliens

Feb 5, 2017 ... There may be signs that alien exist. A+; A-; A; Print. The universe is not just vaster than we imagine, but vaster than we can imagine. Scientists ...