Middle of winter in the Colorado high country can be a daunting place. Lately, frigid cold has slid down the mountains and ...

Now, using algebraic topology, researchers from the UK have developed a scheme for creating optical vortices in propagating laser fields to form knots and links (Nature Phys. 6, 118–121 ...

This guide will walk you through the simple process of tying the half Windsor, making it your new go-to tie knot. The post ...