- House cats have 18 claws.
- Your feet typically produce a pint of sweat every single day.
- 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.
- Penguins are only found in the southern hemisphere primarily in Antarctica (excluding zoos above the equator).
- A group of jellyfish is called a smack.
- Frogs can't swallow with their eyes open.
- The bones of a pigeon weigh less than its feathers.
- The average koala sleeps 22 hours each day.
- Isaac Newton discovered the laws of physics and brought together many important concepts of infinitesimal calculus.
- Finland has the largest number of islands in the world (over 179,550).
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