Engineers in South Korea have pushed the boundaries of nuclear fusion by setting a new record for maintaining plasma.
Plasma is one of the four states of matter - the others being liquid, gas and solid - with examples being lightning and the sun.
In a reactor at a national fusion facility, a team managed to keep superheated plasma in a steady state for more than a minute.
The new record marks another step towards nuclear fusion as a potentially limitless source of energy.
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