Curiosity Finds Ancient Organic Clues on Mars, Still No Evidence of Life

NASA's Curiosity rover detected organic molecules in a dried lakebed in Gale Crater on Mars, including benzothiophene and a nitrogen-bearing compound reminiscent of DNA precursors. While these are building blocks for life and suggest preserved chemistry from about 3.5 billion years ago, the findings do not prove life existed there and could result from meteorite delivery or geological processes. The discovery keeps Mars as a prime candidate for past habitability and sets the stage for deeper analysis by the upcoming Rosalind Franklin rover (2028), with the results published in Nature Communications.