- Mathematical developments increased rapidly around the time of the Italian Renaissance in the 16th century and continued through the scientific revolution of the 17th and 18th centuries, becoming increasingly abstract in the 19th and 20th centuries.
- The average shower temperature is 38C (101F).
- The US flag has 13 stripes (representing the original 13 states).
- It takes 1,100 watts to power a toaster.
- Bernhard Riemann was an influential German mathematician who contributed to differential geometry and analysis, paving the way for the development of general relativity by Albert Einstein.
- Banana plants can grow as high as 6 meters (20 feet) tall.
- 2 out of 5 people marry their first love.
- Earth's sky is purple, our eyes just see it as blue.
- Ombrophobia is the fear of rain.
- Lions in the wild usually makes no more than 20 kills a year.
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