Hey, it may not be the coolest looking thing in the world, but the newfangled Rubbee electric-bike kit will get you across town without pedaling. Or at least, some towns. UK-based Rubbee is looking to raise funds via Kickstarter to expand production for a roller-like contraption that may be attached to any bike and kick its electric-only speed up to as fast as 16 miles per hour.
In another case of Nature to the Rescue, scientists have come up with a polyurethane coating that repairs itself in the sun. The secret ingredient: chitosan, which comes from the shells of crustaceans and is also used for water filtration, blood clotting and as a diet aid. The common principle appears to be that it as a binding agent, i.e. it wants to hold certain things together.