The Download: cutting AC emissions, and nature’s drug designer

Anthropic has suspended global access to its top AI models, Fable 5 and Mythos 5, following a directive from the United States that barred foreigners from using these systems. The company stated on Friday that it cannot filter users in real time, necessitating a complete shutdown of access. This decision was reportedly influenced by discussions with Amazon's CEO. Cybersecurity experts have voiced support for the ban, highlighting its importance.

Meanwhile, scientists and startups are exploring solid-state cooling technology as a potential solution to reduce the environmental impact of air conditioning. Traditional AC systems contribute significantly to global electricity consumption and greenhouse gas emissions, accounting for 7% and 3% respectively. Solid-state coolers operate by moving heat through conductive materials, offering a cleaner alternative, though their efficiency compared to conventional AC remains a key challenge.

In a separate development, chemist Tim Cernak is pioneering the role of "conservation chemistry" by using AI tools and robotics to design and test drugs for animals. Cernak, who previously worked in the pharmaceutical industry for nearly two decades, was motivated by concerns over the use of human pharmaceuticals on animals. His innovative approach aims to create safer and more effective treatments for wildlife.