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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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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.