5 fun facts about your body

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5 fun facts about the human body — starting at the top.

1. You’re already using 100% of your brain. The idea that humans only use 10% of their brain capacity is a myth made popular by hucksters and movies.

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From the TED-Ed Lesson What percentage of your brain do you use?

2. You cry three types of tears: basal, reflex and emotional tears. As far as scientists can tell, humans are the only species that cry for emotional reasons.

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From the TED-Ed Lesson Why do we cry? The three types of tears.

3. When you overeat sugary foods, you crave more of them. That’s because an overload of sugar spikes dopamine levels and leaves you wanting more.

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From the TED-Ed Lesson How sugar affects the brain.

4. Whether you’re left-handed or right-handed, you were born that way. Today, about one-tenth of the world’s population is left-handed.

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From the TED-Ed Lesson Why are some people left-handed?

5. Sitting for a long time is bad for your health. That’s because the human body is built for movement. Take a deep breath, stand up and stretch!

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From the TED-Ed Lesson Why sitting is bad for you.

To learn more about the human body, watch this TED-Ed Lesson series. »

3 Comments

  1. bao

    elephants do cry for emotional reason.

  2. Palvinder Mahal

    I do believe in that “10% of brain myth…” oops..! Not a myth… A theory… Just as . Darwin’s was once… but was accepted eventually. So will this one be.

  3. Sherlin

    Whether you’re left-handed or right-handed, you were born that way. I heard about this. It said that this was decided by your genome. I was born left-handed but I’ve turned into right-handed. Things can be changed if you want, even it is decided by your gene.

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