- There are over 100,000 different species of butterflies.
- The word racecar can be spelled the same way backwards.
- 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..
- Domestic cats dislike citrus scents.
- Squirrels can climb trees faster than they can run on the ground.
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