…and nails and candles and wood. Meet Algerian Salim Haini – the man who’ll eat pretty much anything.

At 6.9 feet (2.13 meters), that’s a whole lot of facial hair.

Professor Erle Ellis is proposing a new way to map the Earth’s biomes, taking into account the effect humans have had on the planet.

The granddaddy of all knots. Learn to tie a square knot. This is a very useful knot. Strong, sturdy, and ideal for joining ends of rope together.