Cheap, power-sipping sensors do everything from tracking global warming to keeping your house warm
The ability to scatter lots of wireless sensors over a wide area has tremendous potential, whether it's tracking the melting of a glacier, the stress on a bridge span or the temperature in your home. The trick? Making them cheap enough so you can use plenty, and having them last long enough so you don't break the bank or your back changing batteries (those trips to the glacier add up). This week, Microsoft showed us a prototype version of a wireless sensor that tackles both challenges.