President Vladimir V. Putin of Russia agreed on Tuesday during a phone call with President Trump to halt strikes on Ukrainian energy infrastructure, the Kremlin said in a statement, but restated his concerns about a broader 30-day cease-fire that the United States and Ukraine had agreed upon and proposed to Russia. The result seemed to…

Cancer researchers examining the use of artificial intelligence to detect early signs of breast cancer. Pediatricians tracking the long-term health of children born to mothers infected with the coronavirus during pregnancy. Scientists searching for links between diabetes and dementia. All these projects at Columbia University were paid for with federal research grants that were abruptly…

When President Trump placed new tariffs on China this month, he doubled down on one of his top demands on Beijing: to rein in the chemical companies fueling the illicit production and trafficking of fentanyl into the United States. Mr. Trump has long argued that China is a huge contributor to overdoses that have killed…

A simmering dispute between the Department of Government Efficiency and an independent agency dedicated to promoting peace broke into an open standoff involving the police on Monday, as Elon Musk’s government cutters marched into the agency’s headquarters and evicted its officials. The dramatic scene played out in Washington on Monday afternoon as Mr. Musk’s team…

A jury in California on Friday awarded $50 million in damages to a Los Angeles delivery driver who was badly burned by a cup of hot tea that spilled into his lap in a Starbucks drive-through in 2020, court records show. The driver, Michael Garcia, 30, received multiple skin grafts and underwent other medical treatments…

President Trump wrote on social media on Sunday night that he no longer considered valid the pardons his predecessor granted to members of the bipartisan House committee that investigated the Jan. 6, 2021, attacks on the Capitol, and a range of other people whom Mr. Trump sees as his political enemies, because they were signed…

I became stateless when I was 14 and my family left the Soviet Union. In exchange for granting my parents, my brother and me exit visas, the U.S.S.R. stripped us of citizenship. For nearly a decade after we arrived in the United States, instead of a passport I carried a long rectangular booklet called a…

Rain, snow, hail, dust, fire, tornadoes. A giant cross-country storm system last week led to one hazard after another, lashing California with an atmospheric river, fueling wildfires in Oklahoma and spawning tornadoes from Missouri to Alabama. A part of Texas felt like Mars. Huge stretches of communities across the Midwest and South were reduced to…

A federal judge on Saturday ordered the Trump administration to cease use of an obscure wartime law to deport Venezuelans without a hearing, saying that any planes that had departed the United States with immigrants under the law needed to return. On Saturday, the administration published an executive order invoking the law, the Alien Enemies…

Ukrainian troops have withdrawn from all but a sliver of land in Russia’s Kursk region, according to military analysts and soldiers, as their monthslong campaign to seize and occupy Russian territory appears to be nearing an end in the face of Moscow’s counterattacks. At the height of the offensive, Ukrainian forces controlled some 500 square…