- Your stomach acid can dissolve razor blades: The pH level in your stomach ranges from 1-3, which is strong enough to dissolve thin metals. (Please don't try this!).
- Bananas are slightly radioactive: They contain potassium-40, a naturally occurring radioactive isotope.
- Hot water can freeze faster than cold water (Mpemba effect): Under certain conditions, hot water has been observed to freeze more quickly than cold water, a phenomenon still being researched.
- Sharks have been around longer than trees: Sharks have existed for over 400 million years, while the first trees appeared about 350 million years ago.
- Your nose can remember 50,000 different scents: The human olfactory system is incredibly sophisticated.
- Your brain doesn't feel pain: While it processes pain signals from the rest of your body, the brain itself has no pain receptors.
- The Voyager 1 probe is the farthest human-made object from Earth: It's currently in interstellar space, over 24 billion kilometres away.
- More than 80% of Earth's ocean remains unexplored: We know more about the surface of Mars than the bottom of our own oceans.
- Did you know that a single coding bug in a software program once cost NASA millions?
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