TOO Johnny Appleseed for me to accept.
Many already agree that much of earth's water came from comets. And by "ingredients for life" they mean basic molecules such as amino acids. AAc have been detected in space.
"The hunt for amino acids in extraterrestrial sources began 50 years ago when scientists discovered a variety of non-terrestrial amino acids in meteorites, remnants of asteroids that had fallen to Earth. Their discovery revolutionized the field of astrobiology, reigniting the question of whether life, as we know it, existed elsewhere in the solar system and beyond.
Amino acids, in part, hold the key to ultimately answering that question. They are the building blocks of proteins—the workhorse molecules of life, used in everything from creating hair and fingernails, to the enzymes that speed up or regulate chemical reactions inside cells. Just as the 26 letters of the alphabet are arranged in limitless combinations to make words, life uses 20 different amino acids in a huge variety of arrangements to build millions of different proteins."
http://phys.org/news/2012-11-nasa-extraterrestrial-amino-acids.html
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"Mar. 27, 2008 — Researchers from the Max Planck Institute for Radio Astronomy (MPIfR) in Bonn have detected for the first time a molecule closely related to an amino acid: amino acetonitrile. The organic molecule was found with a 30 metre radio telescope in Spain and two radio interferometers in France and Australia in the "Large Molecule Heimat", a giant gas cloud near the galactic centre in the constellation Sagittarius."
http://www.sciencedaily.com/releases/2008/03/080326161658.htm
You may know better than I. But I thought scientists have yet to observe or create a protein from AA. Or maybe it is they haven’t been able to create the DNA/Dubble Helix from protein. I forget which.
Last I heard, scientists were still working on the exact right conditions that would naturally take AA to DNA as a building block for life.