Days Before Flyby, Ultima Thule Still Mysterious
Clip: Season 46 Episode 1 | 1m 45s
NASA's New Horizons spacecraft is about to visit the most distant object ever explored by humans.
Aired: 01/02/19Video has closed captioning.
The full episode is no longer available for online streaming. Why?
Please continue to enjoy extra(s) from this episode. The full episode is still available for purchase through the "Buy Now" links.