Here’s what you’ll learn when you read this story: A London-based dentist spotted a “hidden in plain sight” third shape within Leonardo da Vinci’s famous Vitruvian Man drawing. The 1490 illustration ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. What is a triangle? We all know that a triangle is a three-sided shape — 1, 2, 3 sides. A triangle also ...