Mark Braxton Rober (born 1980) is an American YouTuber, engineer and inventor.
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.