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Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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

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In 1864, the first barbiturate (barbituric acid) was synthesized.

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The average adult has about 21 square feet of skin.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

An analogy for how cardiac output, resistance, and blood pressure are related. An analogy for how cardiac output, resistance, and blood pressure are related.
The linear meiosis of Neurospora The linear meiosis of Neurospora
A downward-sloping spark line usually indicates high secondary ignition system resistance or an ... A downward-sloping spark line usually indicates high secondary ignition system resistance or an ...
Measuring the resistance of the ECT sensor. The resistance measurement can then be compared with ... Measuring the resistance of the ECT sensor. The resistance measurement can then be compared with ...
Diagram illustrating the difficulty encountered during the replication of the ends of linear chromos Diagram illustrating the difficulty encountered during the replication of the ends of linear chromos
Linear programming problems using the simplex method. Linear programming problems using the simplex method.
Video: Alzheimer's Disease

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