Iran's nuclear agency chief disputed an "incorrect" report submitted by the IAEA as tensions between Tehran and the UN nuclear watchdog heightened amid stalemate over the nuclear deal.
A California-based laboratory produced a 120 percent net energy gain from a fusion reaction, the first time more energy was produced than consumed during the process, the Financial Times reports.
Tehran says it will start enriching uranium to 60 percent purity, a move bringing the fissile material closer to levels suitable for a bomb, after accusing Israel of sabotaging a key nuclear installation.
Japan marks 10 year anniversary of the powerful earthquake, deadly tsunami and nuclear meltdown at Fukushima that traumatised the nation and killed nearly 20,000 people.
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