Scientists are pushing to understand life's chemical origins and potential development in cosmic environments, investigating scenarios like hydrothermal vents, meteorites, potential exotic life on Saturn's moon, and lab-based Darwinian evolution. Research involves simulating hydrothermal vents, exam
Organic compounds in rocks from space, though not signs of biology in themselves, might have been important to the origin of life on Earth – especially in the early period after Earth’s formation, when large asteroids were striking the surface more frequently.
Even the composition of asteroids could offer insight into the early formation of Earth and other planets. “Maybe stuff like that would lead to something sort of lifelike,” said Robert Hodyss, a laboratory studies group supervisor at JPL. Evidence of exotic life forms thriving on methane or ethane, however, might be difficult to detect, even if they somehow developed on Titan’s surface.
Among the best-known of these was conducted by Gerald Joyce, a research professor at the Salk Institute in La Jolla, California, and collaborator Tracey Lincoln. They created an RNA-based system, then coaxed it into sustained Darwinian evolution in a test tube. Lincoln, lead author and Joyce’s PhD student at the time, published the finding in 2009.
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