You've probably already heard of the idea of harvesting electricity from body heat to power small devices, such as those in the far-flung idea of a body area network. Now, a similar idea has been ...

You've heard about flower power. What about tree power? It turns out that it's there, the electric kind, in small but measurable quantities. In fact, there's enough power in trees for US researchers ...

For the first time researchers have run an electrical circuit entirely off power in trees. The findings suggest a new power source for wireless sensors -- and a way to monitor tree health. You've ...