동영상
A Passion for Calendars – From the Maya to Mars
How many days were there in 1752? Is there a year 0? When was there a February 30th? Why did an aluminum company lose $1,000,000 on New Year’s Eve? Who thinks 1900 was a leap…
How many days were there in 1752? Is there a year 0? When was there a February 30th? Why did an aluminum company lose $1,000,000 on New Year’s Eve? Who thinks 1900 was a leap…