Pancakes in space? No that's just the mysterious MU69

It’s a strange little world. At 4 billion miles from Earth, MU69 (also nicknamed Ultima Thule) is the farthest-away object a human spacecraft has ever visited. For the past few years, scientists have labeled MU69 as an unknown, mysterious “puzzle.” After the 13-year-old New Horizons spacecraft eventually swooped by the frozen rock on New Years …