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.
Some studies suggest we can easily drop nuclear and fossil fuels, but they raise serious questions.
A new model of the way the THz waves interact with DNA explains how the damage is done and why evidence has been so hard to gather
A computer model that detects who is influencing whom in a group discussion, can accurately predict who is likely to speak next
The U.S. Geological Survey doubles its estimate for the size of a huge U.S. oil and gas resource.
Government-backed Amonix closes down factory, a sign of tough times in solar and particularly for more complex concentrating photovoltaic technology.
Vermont got it wrong on GMOs. Its mistake will affect people far beyond its borders.
The relativistic motion of clocks on board GPS satellites exactly accounts for the superluminal effect, says physicist.
There is a 50 per cent chance that time will end within the next 3.7 billion years, according to a new model of the universe