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"[..] there is nothing particularly “magic” or special about those four chemicals that evolved on Earth[..]" An interesting corollary would be that, if we find
by RobertoG 8y ago
"[..] there is nothing particularly “magic” or special about those four chemicals that evolved on Earth[..]"
An interesting corollary would be that, if we find them outside Earth, then, probably, they didn't evolve on Earth
- el_cujo 8y ago"In March 2015, NASA scientists reported that, for the first time, complex organic compounds found in DNA and RNA, including uracil, cytosine and thymine, have been formed in the laboratory under outer space conditions, using starting chemicals, such as pyrimidine, found in meteorites. Pyrimidine and polycyclic aromatic hydrocarbons (PAHs) may have been formed in red giants or in interstellar dust and gas clouds, according to the scientists." https://en.wikipedia.org/wiki/Meteorite#Meteorite_chemistry https://en.wikipedia.org/wiki/Meteorite#Meteorite_chemistry, which cites https://www.nasa.gov/content/nasa-ames-reproduces-the-building-blocks-of-life-in-laboratory https://www.nasa.gov/content/nasa-ames-reproduces-the-buildi...