Sun Feb 02 04:01:43 UTC 2025: ## NASA’s Bennu Sample Reveals Building Blocks of Life
**Washington, D.C. – February 2, 2025** – Analysis of samples returned from asteroid Bennu by NASA’s OSIRIS-REx mission reveals the presence of key building blocks of life, strengthening the theory that asteroids may have seeded early Earth with the necessary ingredients for life’s emergence.
Two studies published in *Nature* and *Nature Astronomy* detail the findings. The samples contain a diverse array of organic compounds, including 14 of the 20 amino acids used to build proteins and all five nucleobases that comprise DNA and RNA. Furthermore, the samples show evidence of minerals formed by evaporating brine, suggesting a wet environment conducive to prebiotic chemistry on Bennu’s parent body.
Lead author of one study, astrobiologist Danny Glavin of NASA’s Goddard Space Flight Center, stated that the discovery supports the theory that asteroids delivered the raw materials for life to early Earth. The widespread presence of these building blocks throughout the solar system also increases the possibility of life originating elsewhere.
While the samples don’t contain actual DNA or RNA, the presence of these fundamental organic compounds, previously identified in meteorites but potentially contaminated by terrestrial sources, provides strong evidence due to the pristine nature of the Bennu samples. The researchers emphasize that these are building blocks, and a long way from a self-sustaining life form. However, the discovery offers compelling insights into the origin of life and the potential for life beyond Earth.
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