Bicycle Tutor - Bike Repair Video Tutorials

How a differential gear works

"This great old video is a remarkably clear explanation of how a differential gear works -- the kind of thing that you could show to a young child or an adult and make the lightbulb go on for both of them. "

How the Sunk Cost Fallacy Feeds FarmVille Addiction and Bad Purchases

Physical Clutter Crowds Out Other Thoughts and Steals Focus

"A scientific study, however, explains what clutter does to your brain: it competes for attention, and crowds out the actual thoughts you want to move through."

Make Sure You're Prepared for Disaster with a 72-Hour Kit [Emergency]

"After Japan's earthquake and tsunami earlier this morning, most of the West coast and Hawaii are both under a Tsunami warning. If you don't have an adequate emergency kit in your home, here's how to put one together so you're prepared in the event of an emergency."