7 incredibly simple inventions that are changing the world

The world's most pressing issues need smart solutions, but that doesn't necessarily mean high-tech. While various cutting-edge innovations, such as mind-controlled robotic body suits and microchip drug delivery, are improving the lives of people across the globe, there are also a number of equally impactful inventions with little-to-no electronics. See also: 14 innovations that improved the world in 2014 From a wheel-shaped water container for the developing world to a lamp powered only by gravi...