- A cat can keep purring while inhaling and exhaling.
- There is 200 times more gold in the world's oceans than has been mined.
- The compass and straight edge were powerful tools in the advancement of geometry, allowing the construction of various lengths, angles and geometric shapes..
- Coffee trees produce its first full crop after 5 years old.
- Dairy products account for 29% of all food consumed in the U.S..
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