The challenges facing nuclear fusion as a clean power source. The energy released by nuclear fission heats water into steam. That steam spins a turbine to produce carbon-free electricity.

Unlike wind and solar, fusion doesn't depend on weather conditions. And unlike coal and methane gas , it doesn't contribute to the pollution that causes respiratory illnesses and global overheating.

If we could get to the point where a fusion reaction was controlled and self-sustaining long-term, the only energy input required would be the starting nudge to begin the chain reaction. "Fusion ...

The end of this chain is marked by the fusion of protons with beryllium-7 to form boron-8. This process is key in determining the flow of high-energy solar neutrinos that reach the Earth.

When set off in an intentionally uncontrolled chain reaction, nuclear fusion drives the hydrogen bomb. ... The sun: Facts about the bright star at the center of the solar system. Human evolution: ...

In a first, U.S. scientists have created “net energy” through a nuclear fusion reaction, the Department of Energy announced Tuesday. The successful experiment, which took place Dec. 5 at ...

The resulting reaction produced 3 megajoules of energy. For the first time in the history of fusion research, scientists achieved ignition — more energy was produced by the reaction than was ...

The temperature at which solar fusion occurs, though high (15.5m°C), is well within engineers’ reach. ... a light isotope of helium which is an intermediate stage in the solar reaction.