The atmosphere was stripped away by solar winds, Mars lost its magnetosphere, and then cosmic rays and U.V. bombarded the surface and water escaped to space and went underground.
우주 광선과 자외선들이  표면에 퍼부어졌습니다. 그래서 물은 우주 공간으로 기화하고 땅 속으로 들어갔죠.