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How the Mohs Scale Ranks Hardness
science.howstuffworks.com/environmental/earth/geology/mohs-hardness-scale.htm
The Mohs hardness scale is used by geologists and gemologists as a way to help identify minerals using a hardness test. How does it work?
8 Benefits of High-speed Trains
science.howstuffworks.com/transport/engines-equipment/8-benefits-high-speed-trains.htm
One of the key pieces of infrastructure that we could really use in the U.S. is a high speed, efficient, and effective train system.
For Teen Twins, Bad Behavior Can Be Contagious
Siblings can have a major influence on each other when it comes to bad behavior. Learn how delinquency spreads among twins at HowStuffWorks Now.
Why Some People Faint When They See Blood
science.howstuffworks.com/life/inside-the-mind/human-brain/why-people-faint-sight-blood.htm
What's the science behind fainting at the sight of blood? This BrainStuff video takes a look at the brain's internal toggle switch making some people hit the floor.
How to Unshrink Your Clothes
We've all accidentally put something in the dryer that we shouldn't have. If a garment comes out two sizes small, follow our tips for ways to unshrink it.
Why Do We Scratch Our Heads When We're Thinking?
people.howstuffworks.com/why-do-scratch-heads-when-were-thinking.htm
Ever scratch your head when you're frustrated or thinking? HowStuffWorks found out how this tic became the signal for so many social expressions.
Will we ever run out of magma?
science.howstuffworks.com/environmental/earth/geophysics/run-out-of-magma.htm
Will we run out of magma, or is there an infinite supply within the Earth's crust? Find out if we will ever run out of magma.
What's an Easy Way to Convert Celsius to Fahrenheit?
science.howstuffworks.com/math-concepts/how-convert-celsius-to-fahrenheit.htm
We'll show you both a quick and dirty way, and a precise, more complicated formula for converting Celsius to Fahrenheit (and vice versa).
Osprey vs. Eagle: Distinguishing Between Birds of Prey
animals.howstuffworks.com/birds/osprey-vs-eagle.htm
At first glance, ospreys and eagles might seem like interchangeable kings of the sky. But when making osprey vs. eagle comparisons, you'll find these two impressive birds have more differences than similarities.
How Fuel Cells Work
auto.howstuffworks.com/fuel-efficiency/alternative-fuels/fuel-cell.htm
A hydrogen fuel cell is an electrochemical energy conversion device. Learn why governments are pouring money into fuel cell research.