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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.

Extraterrestrial life

en.wikipedia.org/wiki/Extraterrestrial_life

It is also called alien life, or, if it is a sentient and/or relatively complex individual, ... Although many scientists expect extraterrestrial life to exist, there is no ..... with —but do no...

Top 5 Scientific Claims for Alien Life | Search for Aliens - Space.com

www.space.com/11057-science-claims-alien-life.html

Sep 20, 2013 ... Scientists have claimed to find evidence for extraterrestrial life in microbes ... For as long as we can remember, humans have wondered if we are alone ... with new "proof" of alien visitations, even scientists have claimed to find ...

The 12 most compelling scientific findings that suggest aliens are real

www.businessinsider.com/evidence-for-life-on-other-planets-2015-9

Sep 26, 2015 ... Any signs of life that swam in these waters could therefore be hidden in the Martian soil. Earlier this year, a team of scientists estimated that ...

Proof of alien life: Scientists find staggering extra-terrestrial ...

www.express.co.uk/news/science/603010/Aliens-exist-mysterious-picture-extra-terrestrial-organism-proof-life-space

Sep 4, 2015 ... ... “organism” which scientists claim is latest proof aliens exist. ... He said: “As far as we can tell the particle has no relation to anything found on ...

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 ... THIS astonishing image is the long-awaited proof that alien life DOES exist, scientists have sensationally claimed.

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

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

Scientific accuracy aside, Shostak says the film could hook a new generation on space ... for E.T. As kids stumble out of the theater, they might ask, do aliens exist ? ... Shostak notes that there is no direct proof for any life beyond Earth, but the ...

Greatest Mysteries: Does Alien Life Exist? - LiveScience

www.livescience.com/4597-greatest-mysteries-alien-life-exist.html

Life can be found in almost every nook and cranny of our planet Earth. ... at any other time in history, scientists are optimistic that extraterrestrial life does exist, and that .... So yeah Alien can't exist, I gave you reasons why, now prove me wrong.

Do aliens exist? Most compelling evidence of alien existence ...

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

Some say it's obvious we're not alone, others scorn the very idea and still others yet will hauntingly report their own experiences of alien probings following their ...

5 Images That Suggest Alien Life on Other Planets | Mental Floss UK

mentalfloss.com/uk/space/27081/5-images-that-suggest-alien-life-on-other-planets

Do such photos exist? ... The Mirror does its best to frame the article as a semi- humorous piece, using phrases like 'conspiracy theorists say the snap of a man, without a helmet, is evidence that there are people living on Mars' and 'scientists have poured ... 'The incredible picture that "PROVES" there is lif...

Popular Q&A
Q: Can Science Prove Aliens Exist?
A: Many people have asked if science would ever be able to prove that aliens exist. The answer is that if aliens do exist then science "should" technically be able... Read More »
Source: ezinearticles.com
Q: Can science prove the existence of a supernatural power?
A: No. Science can't. dis. prove it either. It can't be tested. by applying the scientific method. Read More »
Source: wiki.answers.com
Q: Can science prove God exists?
A: There are many scientific theories for God but none are proven. If they were, everybody would know God was real! Read More »
Source: www.chacha.com
Q: Can science prove the existence of God?
A: This article was published on guardian.co.uk at 07.21 EST on Thursday 16 December 2004 . It was last modified at 07.21 EST on Thursday 5 January 2006 . It was f... Read More »
Source: www.guardian.co.uk
Q: But has anyone ever proven that time exists? By that I mean can s...
A: "Proof" is a mathematical construction where theorems are shown to logically follow from assumptions.  Physics does not do "Proofs"  Physics collects evidence a... Read More »
Source: www.quora.com