- The corkscrew was invented in 1890.
- The symbols used for addition (+) and subtraction (-) have been around for thousands of years but it wasn't until the 16th century that most mathematical symbols were invented. Before this time math equations were written in words, making it very time consuming..
- Cheetahs can accelerate from 0 to 70 km/h (43mp/h) in 3 seconds.
- Dolphins can hear underwater sounds from 24km (15miles) away.
- Elephants are the only mammal that can't jump.
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