Electricity from waste heat is just one of the potential uses.
New software tools may improve communication during catastrophic events.
How should we teach kids Newtonian physics? Simple. Play computer games.
What tree huggers can teach us about the public domain of ideas.
Online diarists rule an Internet strewn with failed dot coms.
Companies ready exhaust-scrubbing accessories.
There's a power revolution coming, and it will run on hydrogen.
Experts say lack of goals bedevils new U.S. fuel-cell initiative.
New electronic toll tags will speed freight truck inspections. But the industry cries "Big Brother."
There may be enough natural gas on earth to meet our energy needs for thousands of years. The trick is to ferry it across continents without blowing up.