- The average cow produces 40 glasses of milk a day.
- An average person will spend 25 years asleep.
- The average porcupine has 30,000 spikes.
- The only continent without reptiles or snakes is Antarctica.
- 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..
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