David Grinspoon Quote
Organisms and species do not have cosmological life spans. Gaia does, and this is perhaps a general property of living worlds. Influenced greatly by Lovelock and Margulis, I’ve argued that we are unlikely to find surface life on a planet that has not severely and flagrantly altered its own atmosphere. According to this idea, a planet cannot be slightly alive any more than a person can (at least not for long), and an aged planet such as Mars, if it is not obviously, conspicuously alive like Earth, is probably completely dead.7
David Grinspoon
Organisms and species do not have cosmological life spans. Gaia does, and this is perhaps a general property of living worlds. Influenced greatly by Lovelock and Margulis, I’ve argued that we are unlikely to find surface life on a planet that has not severely and flagrantly altered its own atmosphere. According to this idea, a planet cannot be slightly alive any more than a person can (at least not for long), and an aged planet such as Mars, if it is not obviously, conspicuously alive like Earth, is probably completely dead.7
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