View full lesson: https://ed.ted.com/lessons/can-you-solve-the-seven-planets-riddle-edwin-f-meyer

Your interstellar police squad has tracked a group of criminals to a cluster of seven planets. Now you must apprehend them before their reinforcements arrive. Of course, the fugitives won’t just stay put – they’ll try to dodge you by moving from planet to planet. Can you devise a sequence for searching the planets that’s guaranteed to catch them in ten warps or less? Edwin F. Meyer shows how.

Lesson by Edwin F. Meyer, animation by TED-Ed.