- Ferrets sleep between 18 - 20 hours a day.
- Gunpowder is formed by mixing charcoal, saltpetre and sulphur.
- Elephants sleep between 4 - 5 hours in 24 period.
- The yoke of an Ostrich egg is the largest cell in the world.
- 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.
- House cats have 18 claws.
- The Amazon rainforest produces half the world's oxygen supply.
- The Pacific Ocean is the world's largest.
- The symbols used for addition (+) and subtraction (-) have been around for thousands of years but it wasn't until the 16th century that most mathematical symbols were invented. Before this time math equations were written in words, making it very time consuming.
- Heavier, not bigger, lemons produce more juice.
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