The Duel That Changed American History by Joann Graham.

The most famous duel fought on American soil was undoubtedly that between sitting Vice President Aaron Burr and Secretary of the Treasury, Alexander Hamilton. It was a duel that very likely changed the course of American history.

Video (1min 38ec): Government Warns About Online Scams Tied to Stimulus.

The stimulus plan does not include money for grants for personal financial assistance.

Sites that tell you that you have to pay money to get free money are a scam.

The Federal Trade Commission warned computer users about scammers trying to take advantage of them using the new economic stimulus program as a hook.

They say the government is not giving out cash grants.

Video (2min 27sec): Did Coffee Fuel the Age of Enlightenment? Author Steven Johnson links the rise of coffee house culture to the Age of Enlightenment. Before coffee replaced beer as the daytime drink of choice, says Johnson, "the entire culture basically was drunk all day long."

Author Steven Johnson links the rise of coffee house culture to the Age of Enlightenment. Before coffee replaced beer as the daytime drink of choice, says Johnson, "the entire culture basically was drunk all day long." Steven Johnson talks about his book, The Invention of Air.

Video (24min 8sec): Fascinatingly Sophisticated Chimpanzees of Fongoli.

Husband and wife team Frans Lanting and Christine Eckstrom describe their experiences, from eating termites to battling sweat flies, studying the fascinatingly sophisticated chimpanzees of Fongoli, Africa.

Frans Lanting has been hailed as one of the great nature photographers of our time. His influential work appears in books, magazines, and exhibitions around the world. For more than two decades Lanting has documented wildlife from the Amazon to Antarctica to promote understanding about the Earth and its natural history through images that convey a passion for nature and a sense of wonder about our living planet.