How Differential Steering Works - Simple Explanation of a Complex Concept

Quoting from geek.com

The differential mechanism basically allows each wheel to spin freely of the other, while providing power to both. If one wheel is spinning too slowly the mechanism will keep driving the other one without any skidding. In this situation, the slow one is the inner wheel and the one spinning more quickly is the wheel on the exterior of the turning radius. Thanks to the differential no torque is lost and the tires aren’t shredded every time you make a turn. It’s both brilliant and deceptively simple.

Read the full entry here - http://www.geek.com/articles/geek-cetera/a-brilliant-explanation-of-how-a-cars-differential-works-20111218/

Always Produce

From Paul Graham's How To Do What You Love

"Always produce" is also a heuristic for finding the work you love. If you subject yourself to that constraint, it will automatically push you away from things you think you're supposed to work on, toward things you actually like. "Always produce" will discover your life's work the way water, with the aid of gravity, finds the hole in your roof.