Who Invented the Calendar We All Use Today? 🗓️ w/ Neil deGrasse Tyson Quantumara 0:43 12 days ago 78 510 Скачать Далее
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A brief History of the Calendar and Time Keeping School of Business and Economics 58:19 8 years ago 206 403 Скачать Далее
Tracking Time: The Julian to Gregorian Calendar Transition Explained | Neil Degrasse Tyson #1159 Eye Opener 1:00 1 year ago 290 894 Скачать Далее