[#video: https://www.youtube.com/embed/xpJ8EoGmLuE If the internet was your online physics textbook, the Slow Mo Guys would be writing a good number of those homework ...

Chalk is fun to draw with, and some people even get really good at using it to make art on the sidewalk. If you don’t like tediously developing such skills, though, you could go another route.

Step aboard any well-sailed raceboat today and you’re guaranteed to find somewhere in the cockpit a laminated sheet of paper showing a spreadsheet full of letters and numbers. For everyone directly ...