- The Hindu-Arabic numeral system began developing as early as the 1st century with a full system being established around the 9th century, forming the basis of the numerical digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 that we use today.
- When your face blushes so does your stomach lining.
- Turnips turn green when sunburnt.
- The most popular snack food is potato chips.
- Jellyfish have been on Earth for over 650 million years.
- There are more tigers owned by Americans than in the wild worldwide.
- Siderodromophobia is the fear of trains.
- New York's Central Park was opened in 1876.
- The ice cream cone was introduced in 1904.
- A group of flamingos is called a flamboyance.
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