It is well-known that Pythagoras’ ancient Greek equation for right triangles: a2+ b2= c2 , is older than ancient Greece. We also know that in Khufu’s pyramid the height equals the radius of a circle ...

This simple “Clearwater” drawing tutorial shows how to create the illusion of clean, transparent water using easy techniques ...

This tutorial makes tiger drawing simple, fun, and surprisingly easy to follow. You will start with basic shapes to build the ...

Bees use polarized sunlight scattered by the atmosphere in order to navigate; they always know where the sun is, even if ...

More than 11,000 drawings made 125 years ago were stashed away for years. They have been meticulously restored, and some will ...