Historian Alexis Coe talks about Sam Adams' many failed ventures before he found his calling as a U.S. founding father.

On November 22, 1963, the world fell into mourning when President John F. Kennedy was assassinated in Dallas. Watch a video about that tragic day that changed the course of American history.

Find out how John F. Kennedy changed the relationship between the American people and their president.

Jacqui Rossi talks about John Dalton's discoveries of the atom and color blindness.

Naomi Ekperigin talks about John du Pont's strange, wealthy upbringing and his murder of wrestler Dave Schultz.