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Physical therapy modalities seek to improve weakness, deficient balance or coordination or other factors. Learn about physical therapy modalities.

Do you know what saunas do for your body? Learn about the history, function and health/skin benefits of saunas at HowStuffWorks.

Sizzling temperatures across the globe aren't just bad for humans, they're bad for crops too. Harvests are smaller and that drives up food prices.

Hybrid water heaters are a cutting edge technology. Find out how hybrid water heaters will work at HowStuffWorks.

How long do headlights last? Visit HowStuffWorks to learn how long headlights last.

Did your wool sweater get stretched out? If so, how do you shrink it back to its normal size?

In its nearly 30-year history, the space shuttle program has seen exhilarating highs and devastating lows. Learn all about the space shuttle program.

If you've shopped for cookware lately, you've probably noticed the shocking price range for pots and pans. Is expensive cookware worth it though?

You might have heard that fluorescent bulbs are supposed to be more efficient than normal light bulbs, but is this really the case?

What exactly is green construction technology? Visit HowStuffWorks and learn the 10 technologies used in green construction.

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