This requires information preservation of an order of magnitude of 100 million years
Is this meant to be the (order of magnitude of the) expected time until another intelligent species evolves elsewhere in the galaxy and spreads as far as earth?
I would expect a much larger number (given that we’re currently at 1 intelligent civ per ~10 billion years).
Don’t forget that the Great Filters might be far before the evolution of homo sapiens. I guess the expected time depends on the details of the extinction event. If humanity is destroyed but, for example, mammals (or even primates) survive, then 10^8 years doesn’t sound implausible for another intelligent species to evolve. If, let’s say, only microscopic organisms survive, then… Well, then intelligent life will probably not evolve on Earth again since the sun will cause the oceans to boil off in about 10^9 years.
Is this meant to be the (order of magnitude of the) expected time until another intelligent species evolves elsewhere in the galaxy and spreads as far as earth?
I would expect a much larger number (given that we’re currently at 1 intelligent civ per ~10 billion years).
Don’t forget that the Great Filters might be far before the evolution of homo sapiens. I guess the expected time depends on the details of the extinction event. If humanity is destroyed but, for example, mammals (or even primates) survive, then 10^8 years doesn’t sound implausible for another intelligent species to evolve. If, let’s say, only microscopic organisms survive, then… Well, then intelligent life will probably not evolve on Earth again since the sun will cause the oceans to boil off in about 10^9 years.
No, it is very approximate expected time until new intelligent life appear on Earth, and don’t include alien intelligence.