We’ve seen what happens when you turn on a Roomba and track its vacuum path with long-exposure photography. The LED on top provides a point of focus, and the visual represents an odd blend of chaos and order. Above is what happens when you set different colored LEDs on seven Roombas and let them loose. Don’t miss all the other (clean) messes in the Flickr pool. [via Radiolab]
Unemployment in America, Mapped Over Time
Watch the regional changes across the country from 1990 to 2016.
Who is Older and Younger than You
Here’s a chart to show you how long you have until you start to feel your age.
Graphical perception – learn the fundamentals first
Before you dive into the advanced stuff – like just about everything in your life – you have to learn the fundamentals before you know when you can break the rules.