Astronomer Dr Meghan Gray explains how messed up our calendar is. The mis-match between the length of a day and the time it takes the earth to travel around the sun makes a leap year necessary. From Numberphile.
Astronomer Dr Meghan Gray explains how messed up our calendar is. The mis-match between the length of a day and the time it takes the earth to travel around the sun makes a leap year necessary. From Numberphile.