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Author Question: Okun's Law says that the difference between the unemployment rate and the natural unemployment rate ... (Read 35 times) |
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.