The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
Structure of a typical plant cell
Schematic of typical plant cell
Order and Duration of Sleep Stages Through a Typical Night
Typical optical distributor.
A typical hand-operated vacuum pump.
Cross section of a typical port fuel-injection nozzle assembly. These injectors are serviced as an ...