Even once researchers can reliably get more power out of a fusion reaction than they put in, they'll still need to overcome engineering challenges to scale up fusion energy.

From these indirect observations, scientists have calculated that the scorchingly hot inner core, with temperatures ...

Ukraine latest: Russian officials 'frustrated' with Putin - as Moscow responds to Trump plans to meet Kremlin leader The Kremlin has been discussing Donald Trump's claims that a meeting between ...

The Kremlin has been discussing Donald Trump's claims that a meeting between him and Vladimir Putin is being set up. Meanwhile, Russian elites are concerned with Vladimir Putin's efforts to wage a ...