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- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_1e_(OpenStax)/30%3A_Life_in_the_Universe/30.02%3A_AstrobiologyThe study of life in the universe, including its origin, is called astrobiology. Life appears to have spread around our planet within 400 million years after the end of heavy bombardment, if not soone...The study of life in the universe, including its origin, is called astrobiology. Life appears to have spread around our planet within 400 million years after the end of heavy bombardment, if not sooner. The actual origin of life—the processes leading from chemistry to biology—is not completely understood. Once life took hold, it evolved to use many energy sources, including first a range of different chemistries and later light, and diversified across a range of environmental conditions.
- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_2e_(OpenStax)/30%3A_Life_in_the_Universe/30.03%3A_AstrobiologyThe study of life in the universe, including its origin, is called astrobiology. Life appears to have spread around our planet within 400 million years after the end of heavy bombardment, if not soone...The study of life in the universe, including its origin, is called astrobiology. Life appears to have spread around our planet within 400 million years after the end of heavy bombardment, if not sooner. The actual origin of life—the processes leading from chemistry to biology—is not completely understood. Once life took hold, it evolved to use many energy sources, including first a range of different chemistries and later light, and diversified across a range of environmental conditions.
- https://phys.libretexts.org/Courses/Grossmont_College/ASTR_110%3A_Astronomy_(Fitzgerald)/15%3A_Life_in_the_Universe/15.02%3A_AstrobiologyThe study of life in the universe, including its origin, is called astrobiology. Life appears to have spread around our planet within 400 million years after the end of heavy bombardment, if not soone...The study of life in the universe, including its origin, is called astrobiology. Life appears to have spread around our planet within 400 million years after the end of heavy bombardment, if not sooner. The actual origin of life—the processes leading from chemistry to biology—is not completely understood. Once life took hold, it evolved to use many energy sources, including first a range of different chemistries and later light, and diversified across a range of environmental conditions.