Neil deGrasse Tyson explains the logic behind the leap year, with a brief history in calendars as well. 3 views 5 years ago 3 minutes, 23 seconds Uploaded by NEW FORWARD language school Related videos 1:26 1:26 1:39 1:39 1:41 1:36 1:43 2:10 1:29 2:24 1:53 1:38 1:39 1:39 1:26 1:52 1:39 30:40 25:42 28:36 33:12 29:24 29:32 33:08 29:51 25:43 26:39 24:29 24:41 25:33 27:27 7:24 51:44 18:52 3:10 59:01 0:59 1:40 0:15 3:45 3:39 5:32 12:08 3:23 0:37 5:08 11:23 10:52
