No, Dr. Joe Hanson is not actually a LEGO man. But he is actually a doctor. Creator of the blog and YouTube series It’s Ok To Be Smart, Dr. Joe uploads new videos each week for 1.7M+ YouTube subscribers curious about biology, physics, and Earth science. With a Ph.D in Biology, the Austin-based YouTuber is accomplishing his mission “to tell the world about the awesomeness of ALL THE SCIENCE.” If you’ve ever wondered how an igloo keeps people warm, why the universe is so empty, or how the invention of the toilet changed the course of history, Dr. Joe has the answers. He does an impressive job of creating videos that are both educational and engaging for people of all ages, which explains why the channel gained over 700K subscribers in 2017.