- You can't hum while plugging your nose.
- A human being could swim through the blood vessels of a blue whale.
- Rainbows can only be seen in the morning or late afternoon (the sun needs to be less than 40 above the horizon).
- Early sunscreens included ingredients like rice bran oil, iron, clay, and tar.
- Fish can cough.
- Octopuses think with their tentacles.
- The human eye blinks over 4,200,000 times a year.
- The Nobel Peace Prize is named for Alfred Nobel, the inventor of dynamite.
- Hummingbirds are the only bird that can fly backwards.
- The Eiffel Tower has 1,792 steps.
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