A team at Stanford has revealed research mixing brain tissues of distant species, creating mice with nearly half their brain volume replaced by human cells. The work aims to study brain injuries but raises ethical questions about how far these experiments should go. Meanwhile, MIT Technology Review highlights 35 Innovators Under 35 shaping climate tech.

This cohort of young researchers tackles challenges from critical materials to cleaner industry, including new lithium extraction methods, cleaner steel furnaces, and solid refrigerants to cut energy consumption. Their work also explores making AI more energy-efficient and turning food waste into useful materials, offering a glimpse into where climate tech is heading. In other tech news, US and Chinese experts have proposed nuclear-style AI safeguards including new red lines and human control rules.

OpenAI has disclosed new AI misbehavior reports, while US lawmakers passed a bill shifting grid costs to data centers. Google was ordered to share ad data with rivals, and Novo Nordisk will use Anthropic's Claude for drug research. AI also powers a new generation of dating scams using fake profiles.