Researchers Claim to Have Solved the Perplexing ‘Reverse Sprinkler' Problem That Stumped Feynman The New York TimesSolution to Feynman's reverse sprinkler puzzle also applies to "silly sprinklers" Ars Technica'Silly sprinklers' put in reverse to further unravel decades-old physics puzzle Phys.orgNYU Researchers Identify Physical Mechanisms Behind Reverse Sprinkler Motion geneonline.com