Air & Space
Some researchers speculate that life on Mars – if there is any – may be composed of species that were carried away from Earth on meteorites. Or perhaps both planets were seeded...
When stars go pop, a murderous torrent of energy is released. Life on Earth may have been partly extinguished by just such a violent outburst, but there's little hard evidence...
Solar power captures sunlight to create renewable energy, but recreating the sun on Earth holds even greater energy potential.
Some stars have a high level of comet activity around them, and that could spell doom for any life trying to take root on any local planets.
Scientists are pondering data from the Phoenix Mars Lander, including a nightly cycle in which water vapor in the atmosphere collapsed into the Martian soil.
Some environmentally-friendly stocking stuffers for last-minute shoppers.
Is it coal emissions 'scrubbed' of pollutants that cause acid rain -- or emissions with all the carbon removed, which has never been tried on a large scale?
Electric vehicles might one day make money for their owners by providing storage for nation's power grid.
Dutch company's 'Energy Ball' is small, quiet, highly efficient windmill than homeowners can mount on their roofs.
Carbon Trust supplying manufacturers with labels to let consumers know 'carbon footprint' of each product.