Cricket chirping can tell the temperature outside. Counting how many times a cricket chirps in 15 seconds and then adding 40 to that number will approximately tell you what the temperature is in Fahrenheit

A white tiger can only be born when both parents carry the gene for white colouring.

The reason firehouses have circular stairways is from the days of yore when the engines were pulled by horses. The horses were stabled on the ground floor and figured out how to walk up straight staircases.