Most distant world ever explored gets a new name: Arrokoth

NASA's New Horizons spacecraft flew past the snowman-shaped Arrokoth on New Year's Day, years after exploring Pluto. At the time, this small icy world 1 billion miles beyond Pluto was nicknamed Ultima Thule given its vast distance from us.

Glitter bomb guy

Mark Rober is a former NASA engineer, who, like millions of Americans across the country, fell victim to package theft. When police wouldn't investigate the crime, he took matters into his own hands.