Mark Rober

Mark Rober is a former NASA Jet Propulsion Laboratory engineer who spent seven years working on the Curiosity rover before becoming one of YouTube's most-watched science communicators with 77+ million subscribers. He founded CrunchLabs in 2022, an edtech company delivering hands-on STEM subscription boxes for children, and has helped raise over $94 million across three viral philanthropic campaigns (Team Trees, Team Seas, Team Water). In 2026 he invested $60 million to build Class CrunchLabs, a free STEM curriculum for teachers.