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That wholly inadequate, which is why NASA space scientist Christopher P. McKay
stanley termosas decided to come up with some more specific parameters. Using life on Earth as a model, and taking inspiration from the remarkable way some of this life has adapted to the harshest of conditions, he came up with the following checklist 鈥?one that shows, quite encouragingly, just how extreme alien life can get. Temperature Range Our current conceptions of the origins of life can ;t help us escape an inalienable fact: Life needs liquid water in order to thrive and survive. Here on Earth, it the common ecological requirement for life. Consequently, the temperature of an exoplanet is the first parameter that astrobiologists must consider 鈥?both because of its influence on liquid water and because it can be directly estimated from orbital and climate models of exoplanetary systems. Image: NASA. According to McKay, life can grow and reproduce at temperatures as low as -15 掳C -5 掳F and as high as 122 掳C 250 掳F . That is
stanley usa a very generous 鈥?and encouraging 鈥?range. And to ensure the proper state of water, exoplanets need to have a pressure greater than ~0.01 atmospheres. The Availability of Water But life also requires a minimum amount of liquid water to survive. As demonstrated in Earth deserts, life needs very little water. Mc
stanley uk Kay points out that photosynthetic cyanobacteria and lichens are capable of surviving some of the most water-deprived conditions; some of them live be Oukn Japan s Decade-Long Mission to Mine an Asteroid
It about time Google browser has come to iOS, and we can ;t wait to give it a try. Check back this afternoon for a hands on. Google also took the lid off Google Drive for iPhone and iPad, which you should see in the App Store later today. Google ChromeGoogle I/O
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