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Your search for "observe" returned 2,083 results
Space Trivia
play.howstuffworks.com/quiz/space-trivia
If stargazing is your jam and you know that you could be the next Neil deGrasse Tyson, this celestial trivia quiz will rock your whole galaxy! Are you ready to shoot for the stars?
How The Hells Angels Motorcycle Club Works
auto.howstuffworks.com/hells-angels.htm
The Hells Angels Motorcycle Club is sometimes considered an "outlaw" group. Read about Hells Angels and whether that reputation is deserved.
10 of the Oldest Continuously Inhabited Cities in the World
history.howstuffworks.com/world-history/oldest-city-in-world.htm
It's hard to nail down the oldest city in the world. Some say it's Damascus, Syria, while others suggest it's Jericho, in the West Bank. So which is older?
How Sharks Work
animals.howstuffworks.com/fish/sharks/shark.htm
Sharks are one of the most sophisticated and enduring creatures. Learn about shark movement, shark senses, shark teeth, the daily life of sharks and threats to sharks.
Early Twentieth Century Railroads
history.howstuffworks.com/american-history/early-twentieth-century-railroads.htm
Early 20th-century railroads saw major improvements in safety and comfort, as well as new regulations. Learn more about railroads in the early 1900s.
Ultimate Guide to Elmo
lifestyle.howstuffworks.com/family/activities/how-elmo-works.htm
Elmo, the furry red Muppet on 'Sesame Street,' is the most recognized children's character in the United States. Read this in-depth look at Elmo.
How Meth Works
science.howstuffworks.com/meth.htm
Meth, or methamphetamine, is a stimulant that can leave users toothless and paranoid. So why do so many people go after that high? Learn what meth can do.
1942-1944 Jeep: Jeep Enters World War II
auto.howstuffworks.com/1942-1944-jeep.htm
The 1942-1944 Jeep entered World War II and became an instant success in battle. Learn about the versatility and war feats of the World War II jeep.
How Does an Invisibility Cloak Work?
science.howstuffworks.com/invisibility-cloak.htm
With optical-camouflage technology, the invisibility cloak is a reality. Learn what it is.
In Honor of Martin Luther King Jr.
people.howstuffworks.com/culture-traditions/holidays-other/mlk-jr.htm
The national American holiday honoring Dr. Martin Luther King, Jr. falls on the third Monday in January. Learn about the life and work of this legendary civil rights activist.