There are many things the iPhone can do with the tons of apps available to download, now scientists at NASA’s Ames Research Center have created an add on for the iPhone that can detect chemicals in the air.

The gadget plugs into the dock connector on the iPhone and it can detect traces of methane, ammonia and chlorine gas in the air.

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The main problem with batteries is that they are still too large, relatively heavy and expensive to produce. Which makes an impractical in many applications where size and weight ratio are important factors. Researchers at Fraunhofer research facility in Germany have developed a new ultra-thin and inexpensive battery which could help develop new applications and devices that require a light then and inexpensive battery.

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