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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?

What is the neurochemistry of happiness?

science.howstuffworks.com/life/neurochemistry-of-happiness.htm

There's a connection between our physical bodies and the way it responds to emotion -- but scientists aren't quite sure what it is. Could it be that happiness is little more than a series of neurochemical responses to the world around us?

What is the oldest fossil ever found?

science.howstuffworks.com/environmental/earth/geology/oldest-fossil-ever-found.htm

The oldest fossil ever found could date back to 3 billion years ago. Learn about the oldest fossil ever found in this article.

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