Curling has been in the Winter Olympics for a while now, but it still seems a little strange to most of us. John Shuster, the captain - or "skip" - of the U.S. Curling Team in the Vancouver Winter Olympics, explains this unusual sport,...

Robert Carpick, a curler and a friction scientist, explains what scientists now think causes ice to be slippery. It is believed that there is a nano-thin layer of water on top of the ice that allows skates to slide along ice. Aired Feb....