While nanoparticles and nanocrystals have always existed -- they're even found in volcanic ash -- it was only recently that scientists could manipulate things on the nanoscale. What applications might nanotechnology have in fuel efficiency?
Sometimes the ideas get a little crazy in the race to find clean and inexpensive energy, like tying solar energy to hydrogen production in a palm-sized device. And sometimes those crazy ideas actually work.
Traditional wind power is a promising, through controversial, alternative energy source. But new research is yielding new possibilities: The future of wind may not be in blades, in farms or even fixed to the Earth.
Farmland, farmland, farmland and ... drilling rig? That's the reality in parts of Pennsylvania, where hydraulic fracking for shale gas is bringing in profits and protests. What do you know about this controversial process?