Long considered the holy grail of energy production, in the future fusion could provide clean, carbon-free and non-radioactive electricity production.

<p>Long considered the holy grail of energy production, in the future fusion could provide clean, carbon-free and non-radioactive electricity production.</p>

Get the latest news, sports, entertainment, money and tech stories from USA TODAY through your voice assistant.

<p>Get the latest news, sports, entertainment, money and tech stories from USA TODAY through your voice assistant.</p>