Fruits don't always make it safely from the plantation to the retailer, due in large part to refrigeration issues inside the cargo containers. The current methods for measuring temperature inside fruit cargo containers are not completely reliable - while current measuring devices can measure the air temperature inside, the core temperature inside the individual pieces of fruit is what's more important in terms of quality. Sensors are able to measure the inside of fruit, but the invasive method means sticking a sensor through the skin and into the middle of the "spy fruit." Empa, the Swiss Federal Institute of Technology Domain interdisciplinary research institute, recently came up with a way to fix this common problem, and developed a kind of camouflage sensor that monitors the fruit cargo -- brought to fruition thanks to a 3D printed mold. Read more at 3DPrint.com: http://3dprint.com/169380/empa-3d-pr...-fruit-sensor/