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Thyroid conditions may make getting pregnant impossible.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.