A solar plane dubbed "Solar Impulse", took off from it's home in Switzerland to start a transcontinental flight, the first of it's kind for the plane, which hopes to fly around the world with a newer design in a couple years. Take a look...
http://www.msnbc.msn.com/id/47550887#.T76XVM3ZiKp
It's cool...but the one thing I can't help but wonder is why this seems so technologically far behind? We've been flying for a century now and this solar plane looks like a throwback to the days where we were using heavy materials, needed giant wingspans, and couldn't carry anything while we barely could fly a mile. Is solar power simply not powerful enough for flying or has no one really tried this before?
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