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Testosterone
health.howstuffworks.com/human-body/systems/endocrine/testosterone.htm
Testosterone is one of the most important, but commonly misrepresented hormones found in the body. Learn about the role of testosterone.
Something Produced a Surprising Spike of Methane on Mars
science.howstuffworks.com/methane-spike-mars.htm
Of all the discoveries made on Mars, the detection of methane blowing in the air is probably the most compelling. HowStuffWorks investigates the Mars methane mystery.
Penguins: The Monogamous Tuxedoed Birds That 'Fly' Underwater
animals.howstuffworks.com/birds/penguins.htm
HowStuffWorks looks at penguins, the tuxedoed swimming birds who mate for life and swim like Olympic champs.
What Would a Yellowstone Eruption Mean for North America?
science.howstuffworks.com/science-vs-myth/what-if/what-if-yellowstone-supervolcano-erupted.htm
Welcome to Yellowstone, a natural wonderland that's home to stunning vistas, vibrant plant and animal life ... and a massive and potentially devastating supervolcano.
Reading the Rails: What Was the Hobo Code?
people.howstuffworks.com/hobo-code.htm
Hoboes were a widely displaced brotherhood who illegally hopped trains and journeyed across the country, taking odd jobs wherever they could find them. The hobo code helped them survive.
Paper-mache: Puppets, Piñatas and Bowls Anyone Can Make
lifestyle.howstuffworks.com/crafts/paper-crafts/paper-mache.htm
Paper-mache has been used by ancient cultures and schoolchildren alike to create sculptures, masks and statues that are durable, light and easily created.
Distance Formula: Finding the Distance Between Two Points
science.howstuffworks.com/math-concepts/distance-formula.htm
You can find the distance between two points by using the distance formula. It's an application of the Pythagorean theorem. Remember that from high school algebra?
Lava Isn't the Only Dangerous Aspect of Volcanoes
science.howstuffworks.com/environmental/earth/geology/volcano-dangers-vog.htm
Ash flows, deadly gases and vog are just a few of the other reasons why we all need to respect volcanoes.
The Bizarre Link Between van Gogh's Signature Yellow and Cow Urine
entertainment.howstuffworks.com/arts/artwork/indian-yellow-pigment.htm
The bright yellow hue used to great effect by van Gogh and other painters was eventually outlawed, as it was made of urine from dehydrated cows.
What's the Difference Between 'Affect' and 'Effect'?
people.howstuffworks.com/affect-vs-effect.htm
These two words are often used interchangeably and incorrectly, so here's how to know when to use "affect" vs. "effect."