Fuel efficiency
The ‘fuel efficiency’ of walking is roughly equivalent to 360 miles per gallon. Source
The word ‘Nicotine’
The word ‘Nicotine’ is derived from Frenchman Jean Nicot who introduced tobacco to France in 1560. Source
Once upon a time
Instead of “Once upon a time,” many Korean folktales begin with “Back when tigers used to smoke…” Fact source...
Water color
Water is light turquoise blue due to the weak absorption in the red part of the visible spectrum.