Two dozen companies and organisations signed an open letter urging US policymakers to protect open-weight AI models. The letter, published today (PDF), carries signatures from a list that spans direct commercial rivals and organisations with little obvious overlap in business model: Meta, Microsoft, Nvidia, IBM, Dell Technologies, CrowdStrike, Palantir, ServiceNow, Hugging Face, Perplexity, Mistral, Andreessen

GEOMAR Deploys AI To Extract AMOC Signals From Argo Float Network
For more than 20 years, around 4,000 autonomous profiling floats have been drifting through the ocean, recording data on temperature, salinity, and pressure. (Image Credit: Christina Clauwers)
Researchers at the GEOMAR Helmholtz Centre for Ocean Research Kiel have demonstrated how artificial intelligence and data from the global Argo float program can be used to determine key characteristics of the Atlantic Meridional Overturning Circulation—a current that significantly influences the climate in Europe. The study, published in the journal Ocean Science, presents a new approach to observing this complex system. It could help to monitor the ocean more efficiently and reliably in future—using existing observation networks.
