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Are Polar Bears Endangered?
science.howstuffworks.com/environmental/green-science/polar-bear-global-warming.htm
Polar bears and global warming are getting attention from conservationists and the general public. See why polar bears are threatened by global warming.
Siberia's Batagaika Crater Just Keeps Growing, and That's Not Good
science.howstuffworks.com/environmental/earth/geology/batagaika-crater.htm
It's known as the "Gateway to Hell" and while it might not actually get you there, what it will unleash if it keeps thawing could truly be hellish.
How can parts of Canada be 'missing' gravity?
science.howstuffworks.com/environmental/earth/geophysics/missing-gravity.htm
For more than 40 years, scientists have tried to figure out what's causing large parts of Canada to be "missing" gravity. The force of gravity around Hudson Bay is lower than surrounding areas. Learn about two theories that may explain the phenomenon.
How Sinkholes Work
science.howstuffworks.com/nature/natural-disasters/sinkhole.htm
Sinkholes are much more than holes in the ground. Learn how sinkholes can cause the Earth to swallow up you, your home and your car.
1 Billion People May Become Climate Refugees By 2050
science.howstuffworks.com/environmental/green-science/climate-refugee.htm
Climate refugees are people who have been forced to leave their homes due to an environmental disruption. Learn how the U.N. defines climate refugees.
How Gold Works
science.howstuffworks.com/gold.htm
We love it. We wear it glittering around our necks and sparkling at our ears, wrists and feet. We pass it down to our children and hoard it in secret stashes. Why is this precious metal so prized?
Can animals predict the weather?
science.howstuffworks.com/nature/climate-weather/storms/animals-predict-weather.htm
If animals predict the weather, could they save human lives? Learn if animals predict the weather, or if they have a meteorolgoical sixth sense.
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.
Mt. Vesuvius: Eruptions, History, & Information
science.howstuffworks.com/nature/natural-disasters/mount-vesuvius.htm
Scientists predict that the next eruption of Mount Vesuvius will be violent. Find out what damage could be done if Mount Vesuvius erupts.
Could You Dig a Tunnel Right Through the Center of Earth?
science.howstuffworks.com/environmental/earth/geophysics/question373.htm
Let's say you have a lunch date to make - and it's on the other side of the planet. Wouldn't it be convenient to pop down a hole through Earth's innards? But what would really happen if you did?