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How Currency Works
money.howstuffworks.com/currency.htm
Currency is a complex aspect of human civilization. Find out all about these symbols of financial value.
10 Unsolved Airplane Mysteries
science.howstuffworks.com/transport/flight/modern/10-unsolved-airplane-mysteries.htm
Since 1948, more than 100 aircraft have gone missing while aloft and never been found. Here are 10 unsolved airline mysteries from HowStuffWorks.
How Seed Banks Work
science.howstuffworks.com/environmental/green-science/seed-bank.htm
Seed banks store our world's seeds, in case disaster wipes out a plant species. Find out how seed banks protect our future.
10 Restaurant Chains That Flopped
money.howstuffworks.com/10-flopped-restaurants.htm
10 restaurant chains that flopped are explained in this article. Learn about 10 restaurant chains that flopped.