The life-bearing debris would have to arrive quite some time after formation of Earth, as it was molten. Surviving atmospheric entry is hard, surviving after landing in lava is impossible.

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hydrogen7800 an hour ago | parent | next [-]

I was going to expand on my comment about the difference between alien and non-alien being a difference only in time. It's all from the same stuff.

	▲	post-it 33 minutes ago \| parent [-]
		It makes a difference to our understanding of the conditions under which life can form.

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gohomeloser an hour ago | parent | prev [-]

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