Dave “Professor Dave” Farina is on a mission – to educate about science in a fun and compelling way. With almost 40,000 YouTube subscribers, his series, Professor Dave Explains, provides science tutorials ranging from photosynthesis to Avogadro’s number. He also provides private and group instruction on science topics. I’m interested to learn more about his motivation to start his YouTube channel and the other irons he has in the fire. Maybe he can help me get my YouTube numbers up!