Wavy Gravy

Q: Why do mathmaticians like national parks?

A: Because of the natural logs



Punchline: "The natural logarithm, formerly known as the hyperbolic logarithm is the logarithm to the base of e, where e is an irrational constant approximately equal to 2.718281828" -wik

PS watch this video: 

http://www.youtube.com/watch?v=VE1HvMadQOI