1. It is a short term for ”binary digit”, meaning a “0” or a “1”

2. The French word ”cadet”, meaning ”younger”, therefore the odd job boy

3. The polar bear, to help get a grip on icy surfaces.

4. Although a popular reason is that it was Renaissance fashion to shave off women’s eyebrows, in 2007 it was discovered that the Mona Lisa was painted with eyebrows and eyelashes, which disappeared over time, perhaps due to overcleaning.

5. Our feet, with 26 bones in each.