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For The First Time, NASA Found Traces Of Tryptophan, An Essential Earth Amino Acid, In Bennu (BN) Samples. This Brings BN’s Total # Of Protein-Building Amino Acid To 15 Of 20 Used On Earth. BN Also Holds All 5 Nucleobases & Water Signs. These Finds Support The Idea That Carbon-Rich Asteroids Delivered Life’s Building Blocks To Early Earth.

https://dailygalaxy.com/2025/11/secret-ingredient-of-life-asteroid-bennu/

NASA uncovers a complex building block of life on asteroid Bennu, challenging long-held beliefs about where life may have started.