Dont ask me how I found this, but an interesting quote from Wikipedia's page on Ice:
Until recently, it was widely believed that ice was slippery because the pressure of an object in contact with it caused a thin layer to melt. For example, the blade of an ice skate, exerting pressure on the ice, melted a thin layer, providing lubrication between the ice and the blade.
This explanation is no longer accepted.
There is still debate about why ice is slippery. The explanation gaining acceptance is that ice molecules in contact with air cannot properly bond with the molecules of the mass of ice beneath (and thus are free to move like molecules of liquid water). These molecules remain in a semiliquid state, providing lubrication regardless of pressure against the ice exerted by any object.[7]
Seriously? We have Olympic sports in which this fact is... well, crucial. And we have no idea how it works? Led me to a cool article, worth the read, and...
http://www.cracked.com/article/161_6-things-your-body-does-every-day-that-science-cant-explain/
What still exists that science has yet to explain? More common and surprising the item, the better, amaze me.
