'Flying' microchips could ride the wind to track air pollution

Researchers have created a winged microchip around the size of a sand grain that may be the smallest flying device yet made, Vice has reported. They're designed to be carried around by the wind and could be used in numerous applications including disease and air pollution tracking, according to a paper published by Nature. At the same time, they could be made from biodegradable materials to prevent environmental contamination.