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What is the UV index and how is it calculated?
science.howstuffworks.com/nature/climate-weather/atmospheric/question160.htm
Every night on the news, the weatherperson reports the UV index. What is the UV index and how is it calculated?
What is the angel hair phenomenon?
science.howstuffworks.com/science-vs-myth/unexplained-phenomena/angel-hair-phenomenon.htm
The "angel hair phenomenon" sounds like a best-selling pasta dish from your local Italian restaurant. Or maybe we're just hungry. But if this phenomenon isn't related to tasty cuisine, what's it all about -- and are angels actually involved?
What is the anthropic principle?
science.howstuffworks.com/science-vs-myth/everyday-myths/anthropic-principle.htm
The anthropic principle states that coincidences are part of the universe's very structure. Learn about the anthropic principle.
What is the definition of insanity?
science.howstuffworks.com/life/inside-the-mind/human-brain/definition-of-insanity.htm
We often throw around the word "insanity" for acts that seem to have no rational explanation (like a teacher giving an insanely difficult test). Legally speaking, though, it's actually a narrow term that's very difficult to prove in court.
What is the difference between a hardwood and a softwood?
science.howstuffworks.com/life/genetic/question598.htm
What is the difference between a hardwood and a softwood? How hard does a tree have to be to be considered hardwood?
What is the energy source of the future?
science.howstuffworks.com/environmental/energy/energy-source-future.htm
What is the energy source of the future? Learn more about the energy source of the future in this article.
What is the future of geothermal energy?
science.howstuffworks.com/environmental/energy/future-geothermal-energy.htm
What is the future of geothermal energy? Learn more about the future of geothermal energy in this article.
What is the future of supersonic flight?
science.howstuffworks.com/transport/flight/future/future-supersonic-flight.htm
What is the future of supersonic flight? Learn more about the future of supersonic flight in this article.
What is the gray goo nightmare?
science.howstuffworks.com/gray-goo.htm
Gray goo is a possible scenario if nanomachines get out of hand. See what gray goo is and all about a possible gray goo nightmare.
What is the history of the remote control?
science.howstuffworks.com/innovation/repurposed-inventions/history-of-remote-control.htm
These days, remote controls seem to, well, control our lives. Most people tend to have piles of them strewn about their living rooms. But where did this ubiquitous technology come from? Where is it headed?