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Airs Wednesday, December 5, 2012 at 9:00 p.m. ET/PT. Check your local listings

Tune in January 5th at 8/7c on PBS for our 2015 season premiere from New York City!

It was on this date in 1861, that President Abraham Lincoln signed the first American income tax into law. And on this date in 1914, the world's first...

On this date in 1922 one of the most popular magazines -- even to this day -- was founded. And in 1936, this federation was established to help animals.

On this date in 1848, the Gold Rush unofficially began in California. And in 1955, one of the best-known boycotts got underway.

On this date in 1869 in Australia, two men stumbled on quite a find. And in 1918, a U.S. pilot made history.

Now that Ohio voters have wiped out the new state law slashing the bargaining clout of public employees unions, a big question looms: will Republicans who…

On this date in 1861, President Lincoln signed into law a first-ever tax of its kind. And in 1914, a new traffic signal made its way into the world...

It was on this date in 1643 that a certain meteorological event was recorded for the first time. And in 1937, a new food was introduced which gained...

On this date in 1865 the first-ever train robbery in the United States took place. And in 1986, Cleveland got some great news