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What makes you dizzy when you spin?
I've wondered about this since I was a child and used to spin around and around. I know it has something to do with our ears, but what exactly makes people dizzy when they spin?
I've wondered about this since I was a child and used to spin around and around. I know it has something to do with our ears, but what exactly makes people dizzy when they spin?
Imagine waking up one morning to find yourself unable to get to work due to a dead car battery. You won't have to do that if you have a solar car battery charger -- but how well do they really work? See more »
When big spills hit our environment, scientists think the best sponge is the one made out of aerogel, a substance that's a cross between a slice of Jell-O and a brick of smoke. Why are aerogels so good at cleaning up some of our worst messes? See more »
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To anyone familiar with the solar panels of the past, the possibility that a tarp could turn solar energy into electricity is pretty amazing. Could your next high-tech tent provide shelter and energy? See more »
People in remote areas can't just connect to the Internet anytime they want. To solve that problem, United Villages has outfitted a number of buses with WiFi equipment. But there's a catch -- it's not a direct connection. See more »
Incubators can save the lives of premature babies, but the devices are expensive and people in developing countries may not be able to afford them. One organization has found a way to help by repurposing old cars. See more »
If you were to fly west around the world, fast enough so that you crossed one time zone every hour, would you stand still in time? See more »