- Before 1863 the postal service in the US was free.
- Red blood cells are produced in bone marrow.
- Humans share 50% of their DNA with bananas.
- No rain fell in Iquique, Chile, for 14 years.
- The cheetah is the only cat that can't retract it's claws.
- The Great Wall of China is approximately 6,430 Km long (3,995 miles).
- There are more trees on Earth than stars in the Milky Way galaxy.
- The Basenji is a dog that yodels instead of barking.
- A crocodile cannot move its tongue.
- The average life span of a mosquito is 2 weeks.
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