Delving into the constant shower of cosmic radiation from space, this episode examines how high-energy particles from solar flares and distant galaxies penetrate Earth's atmosphere and our bodies. Dr. Chen explains particle detection methods and radiation measurement units, while Dr. Rodriguez explores research on radiation's biological effects at different altitudes and latitudes. The hosts discuss the latest findings from NASA's Space Radiation Laboratory, examining how cosmic radiation affects airline crews, space travelers, and everyday people. Special attention is given to the body's natural radiation resistance mechanisms and the fascinating relationship between cosmic radiation and evolutionary biology.