PITTSBURGH (KDKA) - We have done several experiments with pressure and water, and there is a new one I want to show you. Before we get to that, let's take a look at something you probably already have ...

Watch this fascinating demonstration of air pressure at work. Notice how the egg vibrates as the heated air escapes around it, and how it gets smoothly pushed into the bottle by atmospheric pressure.

PRESSURE. >> IT IS NEBRASKA SIGN FEST. TODAY WE ARE DOING OUR EGG IN A BOTTLE EXPERIMENT. I WILL EXPLAIN FIRST. ALL YOU NEED IS A HARD-BOILED EGG, A BOTTLE WITH A WHITE ENOUGH NOW TO EVENTUALLY GET ...