NASA rang in the New Year on Tuesday with a historic flyby of the farthest, and quite possibly the oldest, cosmic body ever explored by humankind--a tiny, distant world called Ultima Thule--in the hopes of learning more about how planets took shape.
NASA rang in the New Year on Tuesday with a historic flyby of the farthest, and quite possibly the oldest, cosmic body ever explored by humankind--a tiny, distant world called Ultima Thule--in the hopes of learning more about how planets took shape.