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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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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Thyroid conditions may make getting pregnant impossible.
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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.