Some studies suggest we can easily drop nuclear and fossil fuels, but they raise serious questions.
Shale gas and new oil-extraction technology are changing the energy map, but global demand is also set to grow.
A bold experiment by the One Laptop Per Child organization has shown “encouraging” results.
A few countries have scaled back in response to the disaster, but many others are building or planning new nuclear reactors.
Our cosmos was “bruised” in collisions with other universes. Now astronomers have found the first evidence of these impacts in the cosmic microwave background.
A new engine design could significantly improve fuel efficiency for cars and SUVs, at a fraction of the cost of today’s hybrid technology.
Not only does student participation decline dramatically throughout the new generation of Web-based courses, but the involvement of teachers in online discussions makes it worse.
The advanced-biofuels industry is in danger of withering away.
Building solar and wind projects in the wrong place is wasting billions of dollars in Europe.
Several ex-NASA officials are behind a company that plans to offer trips by 2020.