Meet Ahmed El Ghandour. He may just be the most popular teacher in Egypt.

The self-confessed physics lover hosts a science series that has clocked up more than 19 million views on YouTube since its launch in 2014.

As Al Daheeh, an insecure nerd, he covers topics ranging from evolution to war and blockchain.

El Ghandour’s aim is to make science fun and accessible to millions. “I love all scientific subjects,” he says. “I can’t stick to learning only one.”

To comment on this story or anything else you have seen on BBC Capital, please head over to our Facebook page or message us on Twitter.

If you liked this story, sign up for the weekly bbc.com features newsletter called "If You Only Read 6 Things This Week". A handpicked selection of stories from BBC Future, Culture, Capital and Travel, delivered to your inbox every Friday.