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Could you dig a hole all the way to the Earth's mantle?
science.howstuffworks.com/environmental/earth/geophysics/dig-hole-to-earths-mantle.htm
Have you ever read "Journey to the Center of the Earth" and wondered if it were possible to do it? Well, scientists are in the process of giving it their best shot. How hard is it to dig a hole this deep, and what might they find?
Crinkle Crankle: The Serpentine Wall With a Funny Name
science.howstuffworks.com/engineering/structural/crinkle-crankle-wall.htm
Crinkle crankle walls undulate, mimicking the shape of a snake's slither. But what's the purpose of these wavy walls?
Cromwell A-27M Infantry Tank
science.howstuffworks.com/cromwell-a-27m-infantry-tank.htm
The Cromwell A-27M Infantry Tank was fast and agile but still outmatched by opposition tanks. Learn about Britain's Cromwell A-27M Infantry Tank.
Crumple Theory: We Can Learn a Lot From How Paper Crumples
science.howstuffworks.com/crumple-theory.htm
Crumpling is a physical process that occurs when a thin sheet is forced to adapt to a smaller space and is seen in everything from DNA packing in a cell nucleus to the formation of mountains.
Cryptocurrency Has a Huge Negative Impact on Climate Change
science.howstuffworks.com/environmental/conservation/issues/cryptocurrency-climate-change-news.htm
Critics warn that cryptocurrency networks, whose computers use enormous amounts of electricity to verify transactions, could be a factor in warming the planet. The industry is working to change that.
Cryptozoology: Hunting Bigfoot and Other Mysterious Beasts
science.howstuffworks.com/science-vs-myth/strange-creatures/cryptozoology.htm
Cryptozoology is the study of creatures that are rumored to exist. But for true believers, these "cryptids" are alive and well and lurking among us.
Curtiss P-40 Warhawk
science.howstuffworks.com/curtiss-p-40-warhawk.htm
The Curtiss P-40 Warhawk is one of the best-liked airplanes of World War II, tough and virtually trouble-free, though its performance was never quite up to that of its opponents. Read about this most important American fighter plane of 1942-1943.
Cyclone vs. Hurricane: Differences Between These Major Storms
science.howstuffworks.com/nature/natural-disasters/cyclone.htm
Both are destructive storms that can pack powerful winds and devastating storm surge. So how are they different? Or are they?
Deadly 1948 Donora Smog Launched the U.S. Clean Air Movement
A killer smog 70 years ago helped lead to the first federal air pollution laws.
Debunking The Perpetual Motion Myth: What is zero-point energy?
science.howstuffworks.com/environmental/energy/zero-point-energy.htm
Imagine an energy source that was infinite, clean, and completely scalable. It would solve many of the world's problems -- and sounds too good to be true ... right?