Overview
- Scientists identified adenine, guanine, cytosine, thymine, and uracil in milligram-scale analyses of Ryugu material.
- Hayabusa2 collected the samples during 2018–19 touch-downs and returned them to Earth in December 2020.
- Direct return of pristine grains reduces the risk of terrestrial contamination compared with meteorites found on Earth.
- Ryugu’s organic mix differs from previously studied meteorites, indicating varied chemical histories across solar system bodies.
- Researchers emphasize the finding does not indicate life and will compare additional Ryugu analyses with NASA’s Bennu samples.