- Less than 3% of the water on Earth is fresh.
- 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.
- Mosquitoes prefer to bite people with Type O blood.
- There are over 100 different viruses that cause the common cold.
- A moth has no stomach.
- Brazil borders every country in South America except Chile and Ecuador.
- A humming bird flaps its wings up to 90 times a second (5,400 times a minute).
- There are around 30 milligrams of caffeine in the average chocolate bar while a cup of coffee has around 100 to 150.
- Kangaroos can't walk backwards.
- House cats have 18 claws.
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