Leap years and why we need them
It's a leap year which means there's an extra day in the calendar - 29 February 2020. But why do we need it?
from BBC News - World https://ift.tt/2T4hbmU
https://ift.tt/2T4hbmU
from BBC News - World https://ift.tt/2T4hbmU
https://ift.tt/2T4hbmU
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