- A person produces enough saliva to fill 2 average size swimming pools during their lifetime.
- Tiger shark embryos begin attacking each other in their mother's womb before they are even born.
- 20% of China's plants are used in medicine.
- Pearls melt in vinegar.
- There is a 50% chance that in a group of 23 people, two will share the same birthday. In a group of 367 people, it is a 100% chance. But only 70 people are required for a 99.9% chance.
- Russia and the United States of America are less than 3 miles apart.
- The Sun has a diameter of 1,390,176km (864,000miles).
- Diamonds mined in Brazil are much harder than those found in Africa.
- A fire will burn faster moving uphill than downhill.
- There are around 30 milligrams of caffeine in the average chocolate bar while a cup of coffee has around 100 to 150.
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