Delivery of Organic Compounds via Meteorites

Approximately 4.5 billion years ago, meteorites delivered organic compounds to Earth. The Murchison meteorite, which fell in Australia in 1969, provides evidence for this process. Scientists identified over 14,000 molecular compounds in this 4.6-billion-year-old meteorite, including 70 amino acids, nucleobases, carboxylic acids, and heterocyclic compounds. Many amino acids showed excess left-handed forms. Isotopic analysis confirmed these compounds formed in space rather than from terrestrial contamination. Studies of other carbonaceous chondrites support these findings, demonstrating that complex organic molecules reached early Earth through extraterrestrial delivery.