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...seas and lakes, but still sometimes kill cows and dogs, rapidly, in hours, by destroying their livers. Sudden deaths after nibbling at algal blooms washe If it's so hard to return a sample of rock by 2040, what about an astronaut who has landed on Mars, and got covered in Ma ...

...irst=Emily |last=Lakdawalla |date=21 September 2009 |accessdate=4 December 2011}}</ref> The planet's disc is about three-quarters illuminated. Almost no va ...by ''[[Mariner 10]]'' processed from two filters. The surface is obscured by thick [[sulfuric acid]] clouds. ...

...author=Staff |title=Water worlds could support life, study says - Analysis by UChicago, Penn State scientists challenges idea that life requires 'Earth c ...Earth might host life is an ancient one, though historically it was framed by [[philosophy]] as much as [[physical science]].<ref group=lower-alpha>This ...

...mination''' refers to [[biological contamination]] of a [[planetary body]] by a [[space probe]] or [[spacecraft]], either deliberate or unintentional. ...ection of humans and human habitats in space and on other celestial bodies by extraterrestrial organisms, if such habitats exist. ...