A few weeks ago Keegan Stephan, a bike mechanic and member of environmental group Time's Up! brought with him to the Occupy Wall Street protests a device he built over a year ago to power his ...

What would you do if you lived in a place where the power supply was constantly disrupted by war? How would you keep your phone, laptop, fridge, or TV running when the grid goes down? That’s the ...

Lithuanian startup Tukas EV has developed an exercise bike that harnesses the energy you produce while peddling and stores it as a backup source of power for household devices and appliances. The ...