- The word 'lethologica' describes the state of not being able to remember the word you want.
- The human body creates 2,500,000 new red blood cells every second.
- Sharks have been on Earth for over 400 million years.
- The Chinese used fingerprints as a method of identification as far back as AD 700.
- The yo-yo was originally used as a weapon for hunting the in the Philippines.
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