How do we tell time and read a clock?
Clock's Secret Code
How do we tell time and read a clock?

A clock looks like a riddle the first time you really stare at it. Two arms spinning in circles, a ring of numbers, and somehow this contraption tells you whether it's time for breakfast or bed. So how does a wheel of numbers turn into the word "now"? Let's take it apart and see.
First, the big idea. A day is just one full spin of the Earth — light, then dark, then light again. To make that spin easier to talk about, we chopped it into 24 equal slices and called each slice an hour. The clock's job is to tell you which slice you're standing in right now.
