In 1992, NASA studied C. elegans worms exposed to space radiation on IML-1; the experiment reported higher mutation rates than in ground controls

In 1992, micro worms unveiled the troubling effects of space radiation on DNA, showcasing considerable genetic harm to these minuscule creatures. This finding raises alarm for astronauts who lack Earth's magnetic shield, exposing them to similar hazards. As NASA continues to grapple with radiation exposure limits for upcoming lunar and Martian expeditions, ensuring the genetic safety of astronauts on prolonged journeys remains a critical and unresolved challenge.