Industries and governments had a really weird preoccupation with protecting people from margarine way before it was made with the hydrogenated oils that led to its unhealthy reputation in more recent years. There's even bootlegging involved.
Peanut butter got its name in the 18th century, but it's been around in some form for hundreds and hundreds of years. The more modern history of the spread features changes to the recipe and even a little litigation with the FDA.
As one of history's most well-known globetrotters, Marco Polo is credited with many important contributions to Western civilization. Many believe pasta is one of these contributions -- but is it a myth? Learn more in this podcast from HowStuffWorks.com.