For the first time in years, the Kremlin has officially claimed to have tested one of its so-called "super weapons" — the ...

Historian Serhii Plokhy explains why the Kremlin’s nuclear proliferation has begun a dangerous new era of mutually assured ...

As Moscow threatens to launch nuclear warheads against NATO states helping Ukraine fend off the Russian invaders, the world ...

The global salience of nuclear weapons — once expected to diminish after the Cold War — is instead rising sharply. This ...

US President Donald Trump and Russian President Vladimir Putin have spent weeks trading threats to restart nuclear tests, an escalation kicked off by Putin’s boasts about tests of the Poseidon nuclear ...

Russia on Tuesday offered to discuss with the United States allegations from Washington that it had carried out secret underground nuclear tests, in a bid to ease tensions between the ...

Nuclear-powered cruise missiles are not a new idea—they’re just a bad idea. While Russia’s Burevestnik missile is grabbing ...

Beijing’s rising nuclear power and anti-use stance are helping temper Russia’s nuclear threats in its war against Ukraine.

Earlier this week, Russian President Vladimir Putin revealed that his government has finalized testing of a new nuclear weapon and a nuclear-powered vehicle he claims would give his country a major ...

Iranian scientists and nuclear experts made a second covert visit to Russia last year, in what the US claims has been a push ...

As Russia threatens nuclear attacks on Ukraine and NATO, and prototypes a nuclear-armed spacecraft, European space powers are ...

Hydronuclear experiments, barred globally since the 1990s, may lie behind President Trump’s call last month for the United ...