In addition to one seeding the other, neighboring planets having life also gives support to extra-solar-system panspermia. An advanced civilization could've fired off the "seed" in some vehicles on calculated trajectories to all viable planets, and the Solar System happened to be within the radius of their efforts.

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estimator7292 2 days ago | parent | next [-]

Panspermia is such a juvenile take. It doesn't answer the question at all, just hand-waves it all away with a "because I said so". It's like a religion.

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roncesvalles 2 days ago | parent [-]

I was never attempting to answer where life came from. It's simply that if Mars and Earth both have/had life, the probability that they came from some common cosmic seeding project in our neighborhood becomes a bit more likely.

	▲	vlovich123 2 days ago \| parent [-]
		Vs it’s a natural inevitable process when the conditions support it?

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vlovich123 2 days ago | parent | prev [-]

Where do the turtles start?