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Can You Identify the Tree From Its Bark?
play.howstuffworks.com/quiz/can-you-identify-the-tree-its-bark
From busy cities to lush jungles, from tall mountains to blistering deserts, trees can be found everywhere. Get ready to put your knowledge of trees to the ultimate test with this tree bark quiz!
Test Your Mental Mettle With These Ridiculous Riddles
play.howstuffworks.com/quiz/test-your-mental-mettle-with-these-ridiculous-riddles
Riddles certainly aren't new. In fact, ancient Sumerians were writing them over 4000 years ago! Let's see how well you do with our collection of brain-teasers!
The RB-47 UFO Encounter
science.howstuffworks.com/space/aliens-ufos/rb-47-ufo.htm
The RB-47 UFO incident of 1957 was classified for years after it happened. Read how an RB-47 planed encountered two UFOs over Mississippi and Texas.
Why has the World Trade Center memorial been delayed?
people.howstuffworks.com/wtc-memorial-delay.htm
Learn why, or whether, the WTC memorial project is behind schedule.
1915 Harley-Davidson 11F
auto.howstuffworks.com/1915-harley-davidson-11f.htm
The 1915 Harley-Davidson 11F motorcycle had an advanced-for-its day 11-horse F-head V-twin engine. See pictures and a profile of this historic Harley.
1942 Harley-Davidson WLA and XA
auto.howstuffworks.com/1942-harley-davidson-wla-and-xa.htm
The 1942 Harley-Davidson WLA motorcycle and Harley-Davidson XA motorcycle were weapons of World War II. See pictures and learn about these Harleys.
How Racing Team Trailer Towing Works
auto.howstuffworks.com/auto-parts/towing/vehicle-towing/trailer/racing-team-trailer-towing.htm
Interested in racing team trailer towing? Learn all about racing team trailer towing at HowStuffWorks.
How Laser Printers Work
computer.howstuffworks.com/laser-printer.htm
Laser printers are fast, precise and inkless. So how do the words get there? How can a laser beam write on paper? Read about laser printer technology.
How Emergency Power Systems Work
home.howstuffworks.com/home-improvement/household-safety/emergency-power.htm
Most of us are entirely dependent on electricity, so a power outage can become seriously annoying. Learn about the generators and inverters that can put an end to home power failures.
How Thermochromic Ink Works
electronics.howstuffworks.com/gadgets/other-gadgets/thermochromic-ink.htm
Thermochromatic ink is temperature-sensitive and once rocked the '70s. Find out how thermochromatic ink works.