Senior Pentagon officials have arrived in Ukraine to discuss efforts to end the war with Russia, the US military has said. The team, led by US Army Secretary Dan Driscoll, is expected to meet Ukrainian President Volodymyr Zelensky in Kyiv on Thursday when he returns from a trip to Turkey. Reports began surfacing on Wednesday that the US and Russia had prepared a new peace plan, containing major concessions from Ukraine. Neither Washington nor Moscow has officially confirmed the plan. Earlier in the day, at least 26 people were killed in a Russian missile and drone attack on Ukraine's western city of Ternopil, officials there said.

To benchmark a model's long-form factuality in open domains, we first use GPT -4 to generate LongFact, a prompt set comprising thousands of questions spanning 38 topics. We then propose that LLM agents can be used as automated evaluators for long-form factuality through a method which we call Search-Augmented Factuality Evaluator (SAFE).

The fast-moving comet likely comes from a solar system that is older than our own. This image shows the halo of gas and dust, or coma, surrounding comet 3I/ATLAS, the third interstellar object ever detected by astronomers as it passes through our solar system. The image was taken on Oct. 9, 2025, by an instrument onboard NASA's MAVEN spacecraft, which has been studying Mars from its orbit since 2014. Breakthroughs, discoveries, and DIY tips sent every weekday. Today, NASA released the most detailed images yet of 3I/ATLAS .

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Army Secretary Dan Driscoll arrives in Kyiv on a fact-finding mission to meet with Ukrainian officials and discuss efforts to end the Russia-Ukraine war.

Study of 320,000 adults reveals there is no safe level of smoking, with even light smokers facing significantly higher risks of heart disease and early death.

Depending on foreign-made open models is both a supply chain risk and an innovation problem, experts say. Since 2022, America has had a solid lead in artificial intelligence thanks to advanced models from high-flying companies like OpenAI, Google DeepMind, Anthropic, and xAI. A growing number of experts, however, worry that the US is starting to fall behind when it comes to minting open-weight AI models that can be downloaded, adapted, and run locally. Open models from Chinese companies like Kimi, Z.ai, Alibaba, and DeepSeek are now rapidly gaining popularity among researchers and engineers worldwide, leaving the US as a laggard in an increasingly vital area of AI innovation. "The US needs open models to cement its lead at every level of the AI stack," Nathan Lambert, founder of the ATOM (American Truly Open Models) Project, tells WIRED.

Randomized trials are widely considered as the gold standard for evaluating the effects of decision policies.

The Israel Defense Forces struck Hamas "terrorist targets" in Gaza on Wednesday following the latest ceasefire violation threatening Israeli troops.

This material may not be published, broadcast, rewritten, or redistributed. Quotes displayed in real-time or delayed by at least 15 minutes. Market data provided by Factset . Powered and implemented by FactSet Digital Solutions . Mutual Fund and ETF data provided by Refinitiv Lipper .