Discover what ex-post means in finance, how it is calculated, and how it differs from ex-ante. Use historical data to better ...

Master calculating cost of equity in Excel using CAPM. Discover step-by-step guidance on market return, risk-free rate, and ...

ECMWF Launches First Operational AI Weather Model ECMWF has been developing the Artificial Intelligence Forecasting System ...

Lin Tian receives funding from the Advanced Strategic Capabilities Accelerator (ASCA) and the Defence Innovation Network. Marian-Andrei Rizoiu receives funding from the Advanced Strategic Capabilities ...

Many of the best 55-inch TVs are on sale for Cyber Week, including our best overall pick, the LG OLED Evo C5. For more deals, check out our roundup of the best Black Friday TV deals. For many living ...

On Monday, Anthropic announced Opus 4.5, the latest version of its flagship model. It’s the last of Anthropic’s 4.5 series of models to be released, following the launch of Sonnet 4.5 in September and ...

An illustration Anthropic commissioned to mark the release of Opus 4.5. (Anthropic) Hot on the heels of Google's Gemini 3 Pro release, Anthropic has announced an update for its flagship Opus model.

If you are a business owner, AI enthusiast, or professional exploring affordable AI tools, you have probably been in a similar situation. You need ChatGPT for one task, Claude for another, and ...

The company says its AI weather model is faster and more accurate than ever. The company says its AI weather model is faster and more accurate than ever. is a senior science reporter covering energy ...

A brand-new AI forecast model has been the top performer in the 2025 Atlantic hurricane season, according to an expert at the University of Miami. A brand-new AI forecast model has been the top ...

Author’s Note: This will be the last routine issuance of the daily Talking Tropics newsletter for the 2025 hurricane season unless conditions warrant otherwise. I extend my deepest gratitude to all ...

Monster storm Hurricane Melissa rampaged over Jamaica as one of the most powerful hurricanes on record before sweeping over Cuba and the Bahamas this week, leaving destroyed homes, flooded communities ...