Science is Exploration

摘要

Over the past two years, NASA's robotic explorers have opened our eyes to the scientific beauty of Mars and our solar system. We have found intriguing evidence for water and just begun to understand the implications for life on Mars and on three outer-planet moons (Europa, Titan and most recently Enceladus). We have returned pristine samples of a comet that could hold clues to the formation of the solar system and the Earth within it.