The average adult has about 21 square feet of skin.
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.
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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.
Growth response by grasses grazed by wildebeest
Dose–response relationship
Response to Sound Waves
How to solve a half life problem involving exponential models (Question 1)