Bill Hammack
![Hammack in 2015](https://upload.wikimedia.org/wikipedia/commons/b/be/Bill_Hammack.jpg)
Hammack is well known for his ventures in science communication as the persona ''Engineer Guy'': between 1999 and 2005 he produced radio commentaries for Illinois Public Media, and starting in 2010, he produced a regular series of videos on YouTube explaining the engineering of everyday objects. He's also one of the authors of the book ''Eight Amazing Engineering Stories''. Provided by Wikipedia