When NASA’s New Horizons flew past Arrokoth on New Year’s Day 2019, it captured humanity’s most distant close-up of a primordial object. The 21-mile-wide object, orbiting in the Kuiper Belt beyond Neptune, looked like a dusty red snowman drifting in space. Scientists were pretty sure Arrokoth was ancient, around 4 billion years old, but how […] The post What Built the Dusty Red ‘Snowman’ Floating in Space? appeared first on VICE .