Each tonsil consists of a network of crypts (pits) that store cells used to fight infection. The tonsils contain B cells, a type of white blood cell that fights infections. They also produce antibodies against polio, streptococcal pneumonia, influenza, and numerous other infections.
Global Warming: What's Up With The Weather? is a DVD presentation of the television special by NOVA and Frontline dealing with questions raised about modern climate change.
The Science of Weather. Weather is a pretty safe topic of conversation. After all, it's always doing something outside ... or might do something soon. It's too hot or it's too cold or it's too beautiful to stay inside. Luckily, the science behind the natural forces that cause the weather is pretty interesting. So next time you find yourself thinking about extreme weather events or just that string of rainy days, turn to these resources to learn more.