Mark B. Rober is an American YouTuber, engineer, and inventor. Before YouTube, Rober was an engineer with NASA for 9 years where he spent seven of those years working on the Curiosity rover at NASA’s Jet Propulsion Laboratory. He later worked for four years at Apple Inc. as a product designer in their Special Projects Group, where he authored patents involving virtual reality in self-driving cars (Source: Wikipedia). He is known for his YouTube videos on popular science and DIY (do it yourself gadgets). With over 19 million subscribers, Mark is killing it with his videos on YouTube. Let’s have a look at the best videos of Mark Rober. Our top picks.