Extraterrestrial life As biologists learn about life on Earth in all its diversity, and at the rate that new planets are being discovered the search for life elsewhere grows more steadily pressing. We have discovered organisms on the Earth that seem tenacious and tough almost to a fault; they thrive in the most seemingly adverse conditions imaginable, and organisms so fragile and specialized so as to exist in only the most isolated and pristine environments. …showed first 75 words of 1114 total…

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