Gravity Bike Goes Downhill, Fast

If you have ever been a kid (and as you are alive and reading this, I’m assuming you have) then you probably risked your life more than once when you were small. You probably stood or sat on something with wheels and pushed yourself down a hill, only to wobble or panic or scream when [...]

Source: http://www.wired.com/gadgetlab/2011/05/gravity-bike-goes-downhill-fast/

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