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A comment on Mimicking an impact on Earth’s early atmosphere yields all 4 RNA bases.
Comets may have brought much of Earth's water.
Ice, dust & tholins.
Tholins are a sort of like a simple crude oil, thick tarry and orangy brown - very rich in primitive organics and amino acid precursors.
Pluto is red with tholins.
http://www.planetary.org/blogs/guest-blogs/2015/0722-what-in...
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Comets may have brought much of Earth's water.
Ice, dust & tholins.
Tholins are a sort of like a simple crude oil, thick tarry and orangy brown - very rich in primitive organics and amino acid precursors.
Pluto is red with tholins.
http://www.planetary.org/blogs/guest-blogs/2015/0722-what-in...