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Seeking Life Outside Our Comfort Zone

The growing discipline of astrobiology explores other worlds that might harbor life.

[In a South African rock two miles down (at 140 degrees F), scientists have discovered bacteria that use radioactive decay from surrounding rocks as their energy source. These 'extremophiles' have not seen the sun for millions of years.]

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Search for Alien Life Gains New Impetus
Article | When Paul Butler began hunting for planets beyond our solar system, few people took him seriously, and some, he says, questioned his credentials as a scientist.

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