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Your search for "tunnels" returned 499 results
Gravitational Waves! Or the Chirps That Prove Einstein Was Right
We've observed gravitational waves, thanks to two black holes colliding and two interferometers. Learn about gravitational waves at HowStuffWorks Now.
What's Inside Mount Rushmore's Not-So-Secret Chamber?
history.howstuffworks.com/american-history/whats-inside-mount-rushmores-not-so-secret-chamber.htm
Mount Rushmore contains a small chamber, part of an abandoned plan to preserve American history for thousands of years. HowStuffWorks steps inside.
Why Flash Floods Are So Dangerous
science.howstuffworks.com/nature/natural-disasters/why-flash-floods-are-so-dangerous.htm
Both dry and over-saturated soil can contribute to flash flooding. Can anything be done to prevent them from becoming catastrophic?
How Ghouls Work
science.howstuffworks.com/science-vs-myth/strange-creatures/ghoul.htm
Blood-sucking vampires and brain-munching zombies tend to hog all the undead credit, but we think ghouls deserve a macabre article all their own. Read it -- if you dare.
Can You Identify These Landmarks That Were Made During the 1950s?
play.howstuffworks.com/quiz/can-you-identify-these-landmarks-that-were-made-during-the-1950s
The 1950s were a time of global transition, as much of Europe worked to rebuild after WWII while the U.S. took advantage of unprecedented economic prosperity. Take our quiz to see if you can name the most famous landmarks of this decade!
The MOAB Bomb: A Massive Force, But No Match for Nukes
science.howstuffworks.com/the-mother-all-bombs-is-big-its-no-nuke.htm
The MOAB is the largest nonnuclear bomb ever used by the U.S. So what makes it OK to drop this bomb and not a nuclear warhead? We dive in to find out.
Are animals still evolving?
science.howstuffworks.com/life/evolution/are-animals-still-evolving.htm
Evolution is a never-ending process, but some scientists believe it might be speeding up as human activity impacts the environment.
How Atoms Work
science.howstuffworks.com/atom.htm
Atoms are in your body, the chair you are sitting in, your desk and even in the air. Learn about the particles that make the universe possible.
The 'Harry Potter and the Prisoner of Azkaban' Quiz
play.howstuffworks.com/quiz/harry-potter-prisoner-azkaban-quiz
"Harry Potter and the Prisoner of Azkaban" is the third installment in the Harry Potter series. Can you remember what happens to Harry and the gang as they struggle through their third year at Hogwarts? Test your knowledge by taking this quiz.
Boeing's Everett Facility Is the Largest Building on Earth
With 36,000 workers, it has its own fire department, banks, day care facilities, medical clinic and water treatment plant.