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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.

Fermi paradox - Wikipedia

en.wikipedia.org/wiki/Fermi_paradox

The Fermi paradox or Fermi's paradox, named after physicist Enrico Fermi, is the apparent ... In an informal conversation, Fermi noted no convincing evidence of this, ... The second form of the ...

Final proof aliens exist? Nasa photos show ancient Hieroglyphs ...

www.express.co.uk/news/science/613184/Final-proof-aliens-exist-Nasa-photos-show-ancient-Hieroglyphs-carved-into-rock-on-Mars

Oct 20, 2015 ... ALIEN hunters claim to have found the historic 'final straw' of evidence that extra terrestrial beings exist claiming they have discovered ancient ... which have been uploaded to YouTube: "If you zoom in on the original you can see the ... PICTURED: Does Pyramid found on Mars prove Martian civilisation.

Proof aliens exist: Scientists make staggering discovery find ...

www.express.co.uk/news/nature/518510/Aliens-do-exist-scientists-find-proof-of-life-in-space

Oct 6, 2014 ... ... image is the long-awaited proof that alien life DOES exist, scientists have ... “ Everything that we have on the Earth is derived from space, ...

Six signs that aliens might exist - Technology & science - Space ...

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

"I doubt that there are any aliens that close," Shostak says. ... helped direct his career, which is dedicated to the search for E.T. As kids stumble out of the theater , they might ask, do aliens exist? ... Some see evidence that 'aliens' have visited.

Signs of Alien Life Will Be Found by 2025, NASA's Chief Scientist ...

www.space.com/29041-alien-life-evidence-by-2025-nasa.html

Apr 7, 2015 ... Humanity is on the verge of discovering alien life, NASA higher-ups say. ... "I think we're going to have strong indications of life beyond Earth within a decade, ... Do you think life exists on Mars today? ... Hunting for evidence of alien life is a much trickier proposition than ... You may unsubscribe at any ...

Is there any proof or evidence of alien / extraterrestrial life existence ...

www.quora.com/Is-there-any-proof-or-evidence-of-alien-extraterrestrial-life-existence

There is only one credible, verifiable, undisputed piece of evidence: Us. Life formed on our ... By the time you have gone only a few light years (let's say 4.2 LY to the nearest star) the .... Does we have a proof that aliens exist in our world?

Do Aliens Exist? Here's What Scientists Say About Life on Other ...

mic.com/articles/139828/do-aliens-exist-here-s-what-scientists-say-about-life-on-other-planets

Apr 6, 2016 ... People have always thought about extraterrestrial life, what aliens ... many of us believe that we're going to find ... evidence that there is life ...

Celebrity Alien Stories - Shows | History

www.history.co.uk/shows/ancient-aliens/articles/celebrity-alien-stories

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www.ask.com/youtube?q=Do We Have Any Evidence That Aliens Exist&v=stG-ONQipNQ
Jan 17, 2016 ... REAL Shocking Evidence Of Alien Life On Earth ... Top 10 evidence and clues proving that extra terrestrial life may actually exist. ... Since the beginnings of recorded history we as humans have been obsessed with the ... beyond the stars and eagerly grasping after any signs of life beyond our narrow view.