This is interesting primarily because we know a decent amount about the nature of the Chicxulub impact event, so we can model it. And in doing so we've found that it should be possible for microbial life deep inside Earth rocks to end up in heliocentric orbits and to be protected from space radiation long enough to have a reasonable chance of surviving until the rock they are in hits another planetary body in our Solar System.
What this actually means, though, is that likely many other impact events in Earth's history could have done the same thing. Even going back billions of years. Which means that the probability of Earth life having landed on Mars, Venus, or Europa in a way which might have seeded locations favorable to life is very much non zero.
This sort of thing has been speculated about before but never modelled so rigorously using real-world impacts as examples.
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This is interesting primarily because we know a decent amount about the nature of the Chicxulub impact event, so we can model it. And in doing so we've found that it should be possible for microbial life deep inside Earth rocks to end up in heliocentric orbits and to be protected from space radiation long enough to have a reasonable chance of surviving until the rock they are in hits another planetary body in our Solar System.
What this actually means, though, is that likely many other impact events in Earth's history could have done the same thing. Even going back billions of years. Which means that the probability of Earth life having landed on Mars, Venus, or Europa in a way which might have seeded locations favorable to life is very much non zero.
This sort of thing has been speculated about before but never modelled so rigorously using real-world impacts as examples.