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Then you need to explain how life on Earth started a short period after it cooled down. Yes, it took a long time for complex life forms to emerge but life itsel
by namirez 4y ago
Then you need to explain how life on Earth started a short period after it cooled down. Yes, it took a long time for complex life forms to emerge but life itself started right off the bat.
- superposeur 4y ago"Short period" and "right off the bat" are terms without meaning. What sets the scale of "short"?
- namirez 4y agoEasy to look up! By current estimates Earth cooled enough to have liquid water about 4.46B years ago and the first RNA emerged around 4.35B years ago. So it took just over 100 million years for simple forms of life to emerge.
- superposeur 4y agoOk, so you are setting the scale as "from the present conversation back to formation of Earth" and saying that this is large in comparison to "from formation of Earth to formation of RNA". However, I respectfully don't see how this scale has any bearing on the probability of life forming around another system. Formation of life is certainly a prerequisite to the formation of intelligent life (the two events in question). Both could have a probability of occurring much smaller than 10^-24 (approximate # of finite stars in observable universe).
- pfdietz 4y agoThis may just mean that IF life is to originate, it will do so shortly after a solar system forms, or not at all. To infer that the early OoL means OoL is easy has the implicit assumption that the probability of OoL would remain about constant over time.