Why a hydrogen economy doesn't make sense

In a recent study, fuel cell expert Ulf Bossel explains that a hydrogen economy is a wasteful economy. The large amount of energy required to isolate hydrogen from natural compounds (water, natural gas, biomass), ...

Dec 11, 2006 feature
4.1 / 5 (466) 13

For Better Nanowires, Just Add Diamond

Among the positive characteristics of diamond, such as its beauty and unsurpassed hardness, are less well known properties that make it a valuable material in the electronics industry. Now, according to two scientists at ...

Nov 15, 2006 feature
4.2 / 5 (435) 0

Prominent U.S. Physicists Send Letter to President Bush

Thirteen of the nation’s most prominent physicists have written a letter to President Bush, calling U.S. plans to reportedly use nuclear weapons against Iran “gravely irresponsible” and warning that such action would ...

Apr 17, 2006
4.8 / 5 (365) 0

Quantum computer solves problem, without running

By combining quantum computation and quantum interrogation, scientists at the University of Illinois at Urbana-Champaign have found an exotic way of determining an answer to an algorithm – without ever running ...

Feb 22, 2006
4.4 / 5 (395) 0

Towards a new test of general relativity?

Scientists funded by the European Space Agency have measured the gravitational equivalent of a magnetic field for the first time in a laboratory. Under certain special conditions the effect is much larger than ...

Mar 23, 2006
4.8 / 5 (364) 1

Quantum secrets of photosynthesis revealed

Through photosynthesis, green plants and cyanobacteria are able to transfer sunlight energy to molecular reaction centers for conversion into chemical energy with nearly 100-percent efficiency. Speed is the ...

Apr 12, 2007
4.7 / 5 (344) 0

Traffic jam mystery solved by mathematicians

Mathematicians from the University of Exeter have solved the mystery of traffic jams by developing a model to show how major delays occur on our roads, with no apparent cause. Many traffic jams leave drivers ...

Dec 19, 2007
3.9 / 5 (387) 31

Powerful Little Light: LED With 1,000 Lumens

Osram has developed a small light-emitting diode spotlight that achieves an output of more than 1,000 lumens for the first time. That’s brighter than a 50-watt halogen lamp, thereby making the device suitable ...

Mar 15, 2007
4.4 / 5 (336) 3