The promise of abundant, clean energy powered by nuclear fusion is one big step closer thanks to a new experiment. The results are a historic scientific milestone, but energy production remains a ways off.

By Carolyn Kuranz, The Conversation

For the first time, scientists have produced a fusion reaction that created more energy than was expended, a breakthrough to tap into the same kind of energy that powers the sun and stars. It could have huge implications for potentially…

By Miles O'Brien, Dorothy Hastings

Researchers at the Lawrence Livermore National Laboratory in California for the first time produced more energy in a fusion reaction than was used to ignite it, something called net energy gain, the Energy Department said.

By Matthew Daly, Michael Phillis, Jennifer McDermott, Maddie Burakoff, Associated Press

Scientists say they have been able to spark a fusion reaction that briefly sustained itself, a significant milestone on the long path to fusion power.

By Seth Borenstein, Associated Press