The goal of the Stardust-NExT spacecraft is to gather scientific evidence about one of the solar system's most changeable objects -- comets.

VOA: special.2011.02.09

We now know what the scientific basis of that is, it involves activation of our immune system.

我们都知道这样做的科学依据,这牵涉到激活你的免疫系统

耶鲁公开课 - 生物医学工程探索课程节选