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Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Sequential decline of whale catches in the Antarctic shows the strong effect of human predators. Sequential decline of whale catches in the Antarctic shows the strong effect of human predators.
The nitrogen cycle. The five main parts of the nitrogen cycle are: The nitrogen cycle. The five main parts of the nitrogen cycle are:
This red-bellied lemur shows clearly the traits that characterize strepsirhine primates. This red-bellied lemur shows clearly the traits that characterize strepsirhine primates.
Stratigraphic section of the Fayum shows the relative age of early anthropoid fossils. Stratigraphic section of the Fayum shows the relative age of early anthropoid fossils.
Lewis Hine’s 1910 photograph shows a tenement alley in New York City. More famous for his “unsettlin Lewis Hine’s 1910 photograph shows a tenement alley in New York City. More famous for his “unsettlin
The site of nitrogen fixation in symbiotic root nodules The site of nitrogen fixation in symbiotic root nodules
Video: The Lac Operon in E. Coli

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