The San Francisco A.I. start-up believes there is not enough computing power on Earth to build the artificial intelligence it wants to create.
President Vladimir V. Putin heightened his warnings against the West, asserting that Russia should be permitted to employ nuclear arms in the event of an attack by a nation backed by a nuclear power....
Sam Altman, OpenAI’s chief executive, is talking to the United Arab Emirates, Asian chipmakers and U.S. officials to expand the computing power needed to build artificial intelligence....
Iran says Israel wants to trap it into a direct conflict by bombing Hezbollah, even as a new Iranian president tries outreach to the West....
The ballistic missile launch is a sign of the commitment of Xi Jinping, China’s leader, to continue strengthening the country’s Rocket Force and to project power in Asia....
Some hawkish generals think that Hezbollah can be forced to back down, current and former Israeli officials said, while others in the government think Israel must reach a deal with Hamas before expanding the war....
“Russia can only be forced into peace.” President Volodymyr Zelensky of Ukraine urged the Council members to sustain their backing for his country’s resistance to Russia’s full-scale invasion....
At an event in New York, the president said federal investments in climate action would be at risk if former President Donald J. Trump retook the White House....
Also, thousands are fleeing southern Lebanon. Here’s the latest at the end of Tuesday....
The destruction from one of the most intense air raids in modern warfare stretches across southern Lebanon and in pockets of the east....
In his final U.N. speech, President Biden framed his decision to drop his bid for re-election as a lesson that “some things are more important than staying in power.”...
The leaders of Ukraine and Denmark said in a joint interview that allied nations must lift restrictions on arms, increase their production and help Ukraine build weapons inside the country....
The war in Gaza has endured more than 11 months, and violence between Israel and Hezbollah, the Iranian-backed Lebanese militia, has risen sharply over the last week....
A new memo, released by two of the leading Democratic groups working in battleground states, lays out worrying signs for Vice President Kamala Harris among younger voters and voters of color....
Serhiy Zhadan, 50, is a beloved Ukrainian poet as well as a novelist, lyricist and rock star. Furious over the invasion, he enlisted to fight even as his band still plays and his readings fill halls....
With Monday’s attacks across southern Lebanon, the prospect of the escalating conflict enveloping the city has suddenly become real for many Beirut residents....
Beijing’s leaders are working with regional neighbors on the country’s western, northern and southern borders to develop new rail and sea links....
Jim Covello, Goldman Sachs’s head of stock research, warned that building too much of what the world doesn’t need “typically ends badly.”...
Staff Sgt. John A. Tarbert of the Air Force died weeks before his son was born, but he was accounted for only this year....
Satellite photos showing a 200-foot-wide crater at a launch site indicate that the Sarmat missile, said by the Kremlin to travel at five times the speed of sound, might not be ready for duty....
President Biden is beginning to acknowledge that he is simply running out of time to help forge a cease-fire and hostage deal with Hamas, his aides say. And the risk of a wider war has never looked greater....
President Petr Pavel, a former NATO general who has been vocal in his support for Ukraine, said Kyiv needed to accept that some territory could remain under Russian control, at least “temporarily.”...
The meetings with Sheikh Mohammed bin Zayed were expected to focus on Gaza, the war in Sudan and artificial intelligence....
Finland’s president and NATO’s departing secretary general are urging Mr. Biden to allow Ukraine to use weapons to hit bases deeper inside Russia....
Lebanon’s Education Ministry ordered some schools to close amid warnings from Israel that it was intensifying strikes against Hezbollah and calls for residents to evacuate....
The disclosure, included in a court filing, paints the clearest picture yet of an itinerant contractor who repeatedly said he was willing to die to defend Ukraine....
Exploding pagers, a major Israeli strike in Beirut and Hezbollah attacks deep inside Israel have brought the two sides closer than they’ve been in years to a full-scale war....
Beginning Tuesday, world leaders will discuss three wars, climate change, rising sea levels and proposals to expand representation on the Security Council....
A transformed China, conflicts in Ukraine and elsewhere, and intractable clashes over money have pushed the prospects of progress to a new low....
By tweaking the chemistry of rivers and oceans, humans could remove billions of tons of carbon dioxide from the air. But huge challenges loom....
It’s not just opposition figures who are caught in the Kremlin’s dragnet....