- The compass and straight edge were powerful tools in the advancement of geometry, allowing the construction of various lengths, angles and geometric shapes.
- Blue flames are the hottest, reaching temps up to 3,000 degrees Celsius.
- The bones of a pigeon weigh less than its feathers.
- Spiders have transparent blood.
- A rainbow can only be seen in the morning or late afternoon.
- Spiders are arachnids and not insects.
- The tallest mammal is the giraffe.
- In the 1800s, Cadbury created the first heart-shaped chocolate box.
- The smallest country in the world takes up .2 square miles: Vatican City.
- The Arctic Ocean is the smallest in the world.
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