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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
Did you know?
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Did you know?
Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
Did you know?
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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![Dolores Huerta and Cesar Chavez, leaders of the United Farm Workers, discuss their 1968 strike of ...](https://biology-forums.com/gallery/47/medium_646588_06_12_16_2_57_08_242331057.jpeg)