Silent Earthquakes
Try this demonstration of earthquake movement. Shape modeling clay into two blocks or get two firm sponge blocks. Press the sides of the blocks together while trying to slide them slowly past each other. You may notice that they stick at first, then suddenly…
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Physics
Many Happy Returns!
The boomerang is a bent or angular throwing club with the characteristics of a multi-winged airfoil. When…
Physics
The Weakest Force
Did you know that gravity is the weakest force in the universe? It's true! Physicists know of four fundamental…
Biology
Beware -- Red Tide!
Red tides occur in oceans. They are not caused by herbicides or pollutants, but by a microscopic alga. Karenia…
Engineering
Leaning Wonder of Engineering
Most everyone is familiar with the famous Leaning Tower of Pisa. It's known not so much for its engineering,…