Skip to Content
Komando picks

How a single shape changed the world

Driving at night, you might notice stop signs reflect your headlights back at you. It’s not because they’re made of shiny metal. Stop signs and other road markers are covered in retroreflectors. The technology behind them is simple yet incredible — and it’s used for much more than making road signs visible at night.

Watch next video Using lasers to find hidden cities in the Amazon

cryptocurrency e-book hero

New eBook: ‘Cryptocurrency 101’

Don't want to lose your dough to crypto? Check out my new eBook, "Cryptocurrency 101." I walk you through buying, selling, mining and more!

Check it out