Leap day

Happy Leap Day! It's not often we get a February 29, so to celebrate this day that comes only once every four years (roughly), I researched some questions I've had about leap years, and I wanted to share what I found with all of you.

1. Why do we have leap years?
This one is easy, and you probably already know the answer. The Earth takes more than 365 days to orbit the sun. To be more precise, rounding to three decimal places, it takes 365.242 days for our planet to circle the sun. If we didn't...