The current state of the world in one picture

The Logarithmic Spiral Gears is an extreme example of non-circular gear sets. This set is based on the famous Fibonacci spiral and evokes the cross section of nautilus shell with internal chambers ow.ly/zm1b30ncobM

This is the most dangerous problem in mathematics. Here’s how it works. Pick a number — seven. (you can take any number). Now apply two rules: 1. If the number is odd, multiply it by 3 and add 1.  3 × 7 = 21, plus 1 = 22 2. If the number is even, divide it by 2.  22 ÷ 2 = 11

A mathematical palindrome