There are more sensory neurons in the tongue than in any other part of the body.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
The Dugong is an endangered species; the largest remaining population is found in Australian waters
Miocene apes were found throughout Europe, continental Asia, and Africa.
Population of Major Civilizations of Europe, Asia, and Africa, AD 1500
Islam in Central Asia
By 2100, significant change will be in the far northern latitudes, parts of Asia, and Sub-Saharan