FUNtastic Physics by TK

      You have to see it to believe it:  Slinkies  look crazy not just tumbling down stairs but in free fall. In a new video, YouTube's favorite  Slow Mo Guys  capture the puzzling dynamics of the iconic toy at 1,600 frames per second on a  Phantom Flex  camera. The video, which we discovered via the curators of awesomeness at  L aughing Squid , is not the first to look at the phenomenon and the Slow Mo guys ( Gavin Free  and  Daniel Gruchy ) are willing to admit their take is not exactly super informative.  Luckily Rhett Allain, an associate professor of physics at Southeastern Louisiana University, has  an in-depth look at the science at work over at Wired . He cites the YouTube series  Vertiasium , which went viral with a similar falling-Slinky demo last fall. In the video below, physicist  Rod Cross  explains that the tension of the spring counters the pull of gravity ("equal and opposite force...