What’s better than a handful of sensors for determining if some hostile enemy has set off chemical weapons in a city? How about hundreds of thousands or millions of sensors? If research being done by NASA Ames Research Center under the Cell-All program in the US Department of Homeland Security’s Science and Technology Directorate is taken into production, your next smartphone might contain chemical-sensing circuitry.
[From A new accessory for your iPhone: a NASA-developed chemical sensor]