Can't use 100 as freezing and 0 as boiling. Since 100 is much greater than 0, and the energetic kinetic motion of water molecules are greater while boiling than while freezing, it just makes sense to have the greater value with the greater value, and vise versa.
Not to mention the fact that having huge negative numbers for extremely hot events would be a pain in the arse!

__________________
Courage doesn't always roar. Sometimes courage is that little voice at the end of the day that says "I'll try again tomorrow".
Maturity is knowing you were an idiot in the past. Wisdom is knowing that you'll be an idiot in the future.
Download the
Nosral Confederacy (a shipset based upon the Phong) and the
Tyrellian Imperium, an organic looking shipset I created! (The Nosral are the better of the two [img]/threads/images/Graemlins/Grin.gif[/img] )