There's enough talk about explosives in the media to have a person worried. Not worried enough, it seems, are some people handling the liquid explosive we use every day: gasoline. Understanding the hazards of this substance requires knowing about its physics.
Complaining about nature's quirks, and the disasters that come with them, is a popular pastime. But in spite of some of the troubles North Georgia has experienced in the past, it's realistic to say that we live in a very sheltered part of the world.
You're doing your Christmas shopping. Traffic is heavy. On the main streets, two or more lanes are completely filled with cars. Slow forward movement in your lane ensures a stop at every traffic light.
Most North Georgia homeowners have had this unpleasant experience. You step into the garage or some other room with outside walls after a cold night, and are greeted by a waterfall coming out of the drywall. After turning off the water supply at the meter and using every available towel to mop up the lake that has formed, there are two immediate goals: Fix the damage, and do something that will prevent this from happening again.