Mark Rober is an American engineer, inventor and YouTube personality. He is known for his YouTube videos on popular science, do-it-yourself gadgets and creative ideas. Several of his videos have gone viral, including a digital Halloween costume and a trap for package thieves that releases a fountain of ultra-fine glitter. Prior to YouTube, Rober was an engineer with NASA where he spent seven years working on the Curiosity rover at NASA's Jet Propulsion Laboratory.