A process defining organisms that grow and adapt to stimuli while maintaining a state of organization and energy production and being capable of reproduction.

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How close to Earth's core can organisms live?

We don't to know much about organisms living deep below the Earth's crust. Recently a team led by S. Giovanni discovered some microbes 300 m below the ocean floor. The microbes were found to be a ...
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What are the tests performed by NASA's Mars rovers to establish that life could survive on the planet?

I am particularly interested in the Mars Rovers, which are out there trying to find life. Do they believe that the tests they perform are sufficient to verify the existence of life (Also please ...