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What's the Difference Between Airspeed and Ground Speed?
science.howstuffworks.com/transport/flight/modern/airspeed-vs-groundspeed.htm
Measuring how fast an aircraft travels depends on whether you factor in the speed of the wind behind it.
Popping a Lawn Bubble Is Like Popping a Zit
home.howstuffworks.com/lawn-bubble.htm
You've probably never seen one, but it looks like a waterbed in your yard. And trust us, if you do see one, you'll have an impulse to pop it.
How Fibrodysplasia Ossificans Progressiva (FOP) Works
health.howstuffworks.com/diseases-conditions/musculoskeletal/fop.htm
FOP is an extremely rare bone disease where the muscles, tendons and ligaments turn to bone. Learn about FOP and some of the treatments for FOP.
Can You Identify the State Abbreviation From a State's Outline?
play.howstuffworks.com/quiz/can-you-identify-the-state-abbreviation-from-a-states-outline
When it comes to geography, they say the average American can't locate Afghanistan on a map, but how about Iowa? Take a look at these 50 state outlines and see if you can identify the correct abbreviation.
Railroads of the 1920s
history.howstuffworks.com/american-history/railroads-of-the-1920s.htm
Railroads of the 1920s reflected a time of uncertainty in the industry at the time. Learn more about the railroads of the 1920s.
How Sinkholes Work
science.howstuffworks.com/nature/natural-disasters/sinkhole.htm
Sinkholes are much more than holes in the ground. Learn how sinkholes can cause the Earth to swallow up you, your home and your car.
How Therapeutic Hypothermia Works
health.howstuffworks.com/medicine/therapeutic-hypothermia.htm
During therapeutic hypothermia, doctors reduce a patient's body temperature to prevent cellular damage. See how therapeutic hypothermia saves lives.
July 4 1776: American Independence Day
people.howstuffworks.com/culture-traditions/holidays-other/american-independence-day.htm
Americans celebrate the signing of the Declaration of Independence every year on July 4 with picnics and fireworks. Learn the story behind Independence Day in the United States and how its traditions came about.
1937-1938 Mack Jr Half-Ton Pickup
auto.howstuffworks.com/1937-1938-mack-jr-half-ton-pickup.htm
The 1937-1938 Mack Jr half-ton pickup was the big-rig maker's downsize experiment. See pictures and learn about the 1937-1938 Mack Jr half-ton pickup.
20 Silly and Unusual U.S. Laws
people.howstuffworks.com/20-silly-and-unusual-us-laws.htm
Sometimes a strange law gets on the record books and just never gets taken off. Learn about 20 silly and unusual U.S. laws that haven't gone away.