Today's Highlights:

Monday, October 24, 2005

Monday, October 24, 2005
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Van Leeuwenhoek and
A Microscope
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Spotlight: The first person to observe and describe bacteria, protozoans and spermatozoa was the Dutch naturalist Anton van Leeuwenhoek. Van Leeuwenhoek, born on this date in 1632, made lenses, assembling over the course of time nearly 250 different types of microscopes. He ground and shaped hundreds of different lenses, some magnifying objects up to 270 times. Able to see minute particles, he observed muscle fibers, microbes, and blood flow in capillaries, with his work leading to the establishment of cell biology.
Quote: "A man has always to be busy with his thoughts if anything is to be accomplished."Anton van Leeuwenhoek
Word of the day: eukaryote: an organism whose cells contain a nucleus; the ciliated protists observed by van Leeuwenhoek were examples of eukaryotic organisms. )
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