Extreme Life Briefing
Hottest: 235 F (113 C) Pyrolobus fumarii (Volcano Island, Italy) Coldest: 5 F (-15 C) Cryptoendoliths (Antarctica) Highest Radiation: (5 MRad, or 5000x what kills humans) Deinococcus radiodurans Deepest: 3.2 km underground Acid: pH 0.0 (most life is at least factor of 100,000 less acidic) pH 5-8 Basic: pH 12.8 (most life is at least factor of 1000 less basic) pH 5-8 Longest in space: 6 years Bacillus subtilis (NASA satellite) High Pressure (1200 times atmospheric) Saltiest: 30% salt, or 9 times human blood saltiness. Haloarcula Smallest: <0.1 micron or 500 fit across a human hair width (picoplankton) Credit: USGS
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