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Your search for "volcanic rock" returned 143 results
What If We Drilled Into a Supervolcano?
science.howstuffworks.com/science-vs-myth/what-if/what-if-we-drilled-into-supervolcano.htm
What could happen if we poked one of these sleeping giants? There are two scenarios. One is good. One is very, very bad.
Arizona's Grand Falls Gushes to Life Again
science.howstuffworks.com/environmental/earth/geology/grand-falls-arizona.htm
Arizona isn't all desert. Take Grand Falls, aka "Chocolate Falls." It is dry most of the year, but when it rains, this waterfall pours.
Can You Name the Landform From a Definition?
play.howstuffworks.com/quiz/can-you-name-the-landform-from-a-definition
From mountains to battures, hoodoos to plains, our planet is covered in landforms of all types. How well do you know them? Start taking this quiz to find out!
Climate Change Threatens the Moai of Easter Island
The statues of Easter Island have stood for over 800 years. See how climate change and rising seas are affecting them with HowStuffWorks.
What's the Difference Between a Cave and a Cavern?
science.howstuffworks.com/environmental/earth/geology/cave-cavern-difference.htm
One term might give you the impression of something grand and mysterious, while the other makes you think of claustrophobia-inducing environs that threaten human life. But what's the real difference?
15 Types of Gemstones to Add a Little Sparkle to Your Life
science.howstuffworks.com/environmental/earth/geology/types-of-gemstones.htm
From ancient amulets to modern engagement rings, different types of gemstones have always caught the human eye.
Ghostly, Adorable Dumbo Octopus Spotted by Deep Sea Rover
animals.howstuffworks.com/marine-life/ghostly-adorable-dumbo-octopus-spotted-by-deep-sea-rover.htm
HowStuffWorks shines a light into the deep ocean to look at the Dumbo octopus.
Can humans start an earthquake?
science.howstuffworks.com/environmental/green-science/humans-start-earthquake.htm
Earthquakes are "natural" disasters, right? Yes, but that doesn't mean the shifting plates that cause them can't be aggravated by human industry.
The Blue-footed Booby Dance Gets the Girl Every Time
animals.howstuffworks.com/birds/blue-footed-booby.htm
The blue-footed booby is known as much for its comical mating dance as for its intensely colored blue feet.
What are the dangers of mercury exposure?
home.howstuffworks.com/home-improvement/household-safety/dangers-of-mercury-exposure.htm
What are the dangers of mercury exposure? Find out the dangers of mercury exposure, how to avoid them and how to tell if you've been exposed.