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Railroad Expansion
history.howstuffworks.com/american-history/railroad-expansion.htm
The railroad expansion of the middle and late 1800s changed America forever. Read more about the westward expansion of railroads.
How Hydroponics Works
home.howstuffworks.com/lawn-garden/professional-landscaping/hydroponics.htm
Hydroponics is the practice of growing plants without soil. Learn more about how hydroponics uses water as the nutrients for plants.
How did dinosaurs leave tracks in solid stone?
science.howstuffworks.com/environmental/earth/geology/stone-dinosaur-track.htm
How did dinosaurs leave tracks in solid stone? They walked in soil that became sedimentary rock. Learn how did dinosaurs leave tracks in solid stone?
The Great Flood: More Than a Myth?
science.howstuffworks.com/nature/climate-weather/storms/great-flood.htm
Many cultures have a flood myth -- an ancient story of a deluge that swallowed the Earth. So could a great flood really have happened, and how would we be able to tell?
Why do tigers swim?
animals.howstuffworks.com/mammals/swimming-tigers.htm
Tigers swim in order to cool off, trap prey and relax. Learn where tigers swim, why other big cats don't join in the fun and who the heck Odin is.
Are orangutans introverts?
animals.howstuffworks.com/mammals/orangutan-introversion.htm
The behavior of orangutan introverts stem from their need to find food. Learn why orangutan introverts are more solitary than their fellow apes.
Typhoid Mary Was the Original Super Spreader
history.howstuffworks.com/historical-figures/typhoid-mary.htm
Mary Mallon was an Irish immigrant working as a cook in New York. She was a carrier of typhoid fever, but was she really a ruthless murderer?
How do I build a hurricane shelter?
home.howstuffworks.com/home-improvement/how-to-build/build-a-hurricane-shelter.htm
How do I build a hurricane shelter? With fortified materials and lots of room for your relatives. Learn more about how to build a hurricane shelter.
How to Volunteer for the U.S. Geological Survey
money.howstuffworks.com/economics/volunteer/opportunities/volunteer-us-geological-survey.htm
The U.S. Geological Survey offers opportunities to volunteers interested in natural science. Read about volunteer ideas through the U.S. Geological Survey.
P.T. Barnum Begins Career as Showman
history.howstuffworks.com/american-civil-war/pt-barnum.htm
Most of us know P.T. Barnum because of the circus, but he was actually an important figure in American history. Learn how P.T. Barnum went from small-time entrepreneur to master showman and founder of the "Greatest Show on Earth."