Exploring beneath the surface of other planets may be the key to determining whether life has ever existed outside of Earth.
원문출처 : https://www.cnn.com/2022/07/01/world/mars-reachbot-cave-robot-scn/index.html
원문출처 : https://www.cnn.com/2022/07/01/world/mars-reachbot-cave-robot-scn/index.html