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Your search for "volcanic rock" returned 143 results
Test Your Vocabulary With This Quiz!
play.howstuffworks.com/quiz/you-pass-this-difficult-vocabulary-test-you-deserve-a-phd
Want to test your smarts without the headache of a graduate program? Take this vocabulary quiz, and let's find out if you're smarter than a Ph.D. student.
Square Waves in Ocean Settings Are Rare But Dangerous
science.howstuffworks.com/environmental/earth/oceanography/cross-seas.htm
Square waves also called Cross-sea waves may looks super cool. But you never want to get caught up in the grid-patterned waves they generate.
What Is a Glacier? Everything to Know About These Ice Masses
science.howstuffworks.com/environmental/earth/geophysics/glacier.htm
Glaciers are rivers of ice and are the largest moving objects on Earth. Learn about glaciers and find out how much freshwater are frozen in glaciers.
15 Best Beaches in the U.S.: A Highly Subjective List
lifestyle.howstuffworks.com/family/activities/best-beaches-in-the-us.htm
If you're itching for a summer escape filled with sand between your toes, ocean breezes, and stunning views, then you're probably wondering about the best beaches in the U.S.
What If the Earth Had Two Moons?
science.howstuffworks.com/science-vs-myth/what-if/what-if-earth-had-two-moons.htm
Tons of planets have more than one moon. Heck, Jupiter and Saturn have more than 50 each, and they seem to be doing just fine. So why is it that the idea of a second moon for Earth has scientists throwing up red flags?
10 Scare-inducing Moments in History
history.howstuffworks.com/historical-events/10-scariest-events-in-history.htm
From serial killers to natural disasters, many events in our history have stoked fear among the masses. Here are 10 fear-stoking moments.
10 Ways the Earth Is Trying to Kill You
science.howstuffworks.com/nature/natural-disasters/10-ways-earth-is-trying-to-kill-you.htm
Mother Earth seems to have a love/hate thing going on with humans. While the planet we call home has all the essentials we need for life, it also has some nasty - and deadly - surprises.
The Pili Nut Is a Nutritional Powerhouse Worth Cracking
recipes.howstuffworks.com/pili-nut.htm
The pili nut could be one of the healthiest we've ever seen. So why can't the pili nut crack the health food market? HowStuffWorks takes a bite.
How the Ice Age Worked
history.howstuffworks.com/historical-events/ice-age.htm
An ice age is a period of cooling, marked by the presence of glaciers and ice sheets. Learn how an ice age works and if we're in an ice age right now.
Turns Out Earth's Pulse 'Beats' Every 27.5 Million Years, But Why?
science.howstuffworks.com/environmental/earth/geophysics/earths-pulse.htm
Researchers have been asking this question for almost a century and now we're a little closer to the answer. Something else to ponder: Every 27.5 million years there is usually a mass extinction.