The physics of goo: Swimming in snot is fun

collision detection: The physics of goo:

(Still no cure for cancer, but I would love to see a video of the 16 volunteers flopping around in the goop.)

"Back when he was writing the Principia Mathematica, Isaac Newton argued with his pal Chistiaan Hyugens about an interesting question: Would someone swim faster through water or through a thick, viscous goo? Newton bet you'd go slower; Hyugens argued the opposite. Newton decided to put both viewpoints in the Principia, since he couldn't resolve it. There seemed to be no way to test it: Who was going to go to the trouble of constructing a massive tank and filling it with goo?"