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Did you know?
To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.