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Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Did you know?
Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
People about to have surgery must tell their health care providers about all supplements they take.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.


