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_richas_ t1_jd6mcht wrote

So, does a planet possible of life have to be destroyed or hit with a big rock to spew this out toward us? If so, life elsewhere died so we could see their building blocks (or Legos, if you prefer).

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always_wear_pyjamas t1_jd711ed wrote

That's one idea. Another is that maybe something about the asteroids themselves serves as a medium where these things form easily from simpler molecules.

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albertscoot t1_jd7lnbn wrote

Weren't microbes found in the stratosphere? If a rock misses fully colliding into a planet it could become contaminated I'm guessing.

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