The History of Keeping Time

Where did time-telling come from? What are time zones and why are there so many of them? Get the answers to these questions and more in this journey through the history of time (3:48)

Latest Videos

Preview thumbnail for video'How Eleanor Roosevelt Redefined the Role of First Lady
How Eleanor Roosevelt Redefined the Role of First Lady (1:55)
Preview thumbnail for video'Civil War Submarine Battles Were Often Suicide Missions
Civil War Submarine Battles Were Often Suicide Missions (3:14)
Preview thumbnail for video'Why the Shift to Farming Ruined This Ancient City's Health
Why the Shift to Farming Ruined This Ancient City's Health (3:31)
Preview thumbnail for video'30 Workers Fell While Building the Golden Gate Bridge
30 Workers Fell While Building the Golden Gate Bridge (1:38)
Preview thumbnail for video'Why Nancy Reagan's Sense of Style Wasn't Appreciated
Why Nancy Reagan's Sense of Style Wasn't Appreciated (3:08)
Preview thumbnail for video'How the New Deal Left Out African-Americans
How the New Deal Left Out African-Americans (1:50)
Preview thumbnail for video'Why Did the U.S. Sink Captured Japanese Subs After WWII?
Why Did the U.S. Sink Captured Japanese Subs After WWII? (1:42)
Preview thumbnail for video'Rare Footage of FDR Walking With Leg Braces
Rare Footage of FDR Walking With Leg Braces (2:26)
Preview thumbnail for video'This Priest Witnessed the 9/11 Pentagon Plane Crash
This Priest Witnessed the 9/11 Pentagon Plane Crash (2:55)