If the melting point of water didn't go down with pressure, ice skates wouldn't work. The reason ice is so slippery is that a film of water forms when you stand on it. Think about it: what other solid substance is as slippery as ice?
It's a common phenomenon for carbonated beverages to freeze when you open them. As any high school kid who hid a case of beer in the trunk of his car.
As stated before, water is about the only substance that expands when it freezes. That accounts for a number of odd characteristics in addition to the two I just mentioned. For example, the oceans would freeze from the bottom up if water contracted as it froze.
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Today's Featured Article - The Collection of a Lifetime - by Sherry Schaefer. The larest gathering of orphan tractors ever assembled by one collector will be auctioned off on May 15 in Rock Island, IL. Ed Spiess was a well known tractor buff who spent most of his time dreaming of rare and unknown tractors. His background as an agricultural engineer sparked his interest in the unique attributes of the models built from 1939-1959.
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