[Unimog Bob]

Also talking about how humidity affected how far a baseball could be hit.

If there were no air resistance (that is, if a ball didn't have to make its way through the air on its way out of the park), the ball would travel nearly twice as far. Air resistance depends on humidity, temperature, and altitude: To make a ball go farther, you want high humidity, high temperature, and high altitude.

from http://www.exploratorium.edu/basebal...icslugger.html