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.
Climate is the general trend of weather in a particular place. Even if the climate in a place is usually dry, the weather today might be rainy. Weather consists of short-term changes in the atmosphere such as within minutes to months. Climate consists of patterns of change in a longer period of time. Weather is a local event caused by temporary changes in clouds, wind, etc. Climate is a regional and usually long lasting event. Weather and climate are different by weather is the condition of the atmosphere at a specific time and place.