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The Science of Shade: Unlocking Photochromic Lenses

science.howstuffworks.com/innovation/science-questions/question412.htm

How can my glasses change from transparent, when I'm inside, to dark when I go outdoors?

Could I see a flashlight beam from Earth on the moon?

science.howstuffworks.com/question441.htm

If I was on the moon and the earth was black (no lights were on) and a flashlight was turned on facing the moon, would I see the light? If I couldn't, would there be any way to detect any residual matter that came from the light on Earth or does light die after a certain distance?

DNA Tattoos: I've Got You Into My Skin

people.howstuffworks.com/culture-traditions/body-art/biogenic-tattoos.htm

If you want to tattoo DNA into your skin, there is now a safe method for doing it. HowStuffWorks takes a look at biogenetic tattooing.

How Octopuses Work

animals.howstuffworks.com/marine-life/octopus.htm

The two centimeter male pillow octopus is dwarfed by his six-foot female pillow octopus mate. Learn more about the intriguing octopus.

What Did Benjamin Franklin Invent? Much More Than Bifocals

science.howstuffworks.com/innovation/famous-inventors/10-ben-franklin-inventions.htm

Between running a print shop, engineering the U.S. postal system, and helping sow the seeds of the American Revolution, Benjamin Franklin also found time to draw up a vast collection of new devices. What are some of his most enduring inventions?

How Dark Matter Works

science.howstuffworks.com/dictionary/astronomy-terms/dark-matter.htm

For decades, stargazing scientists have been facing their own darkness on the edge of town as they try to explain one of astronomy's greatest mysteries: dark matter. Have they been successful, or will the universe carry its secrets for a long time?

How does a Star Wars lightsaber work?

entertainment.howstuffworks.com/question171.htm

How do the lightsabers in the "Star Wars" movies work?

What % Physicist Are You?

play.howstuffworks.com/quiz/what--physicist-are-you

Prove that you know the language of the physical world. Does your understanding of natural phenomena start or stop at E=MC^2? Find out what it takes to think like the physics lords who came before us!

Do Dogs Know They're Being Photographed?

animals.howstuffworks.com/pets/do-dogs-know-theyre-being-photographed.htm

Do dogs know when they're being photographed? HowStuffWorks looks into the anecdotal evidence on this one.

Oh Chrismon Tree, Oh Chrismon Tree?

people.howstuffworks.com/culture-traditions/holidays-christmas/chrismon.htm

In 1957, a woman named Frances Kipps Spencer invented "Chrismons" to remind parishioners of the true meaning behind the Christian celebration of Christmas.

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