Facing a growing surgeon shortage, artificial intelligence is being developed to coach medical students in surgical techniques, offering real-time, personalized feedback as they practice. This new tool, trained on expert surgeons, aims to provide a scalable solution for practice and detailed evaluation beyond traditional methods.

A small tweak to your social media feed can make your opponents feel a little less like enemies. In a new study published in Science, a Stanford-led team used a browser extension and a large language model to rerank posts on X during the 2024 U.S. presidential campaign, showing that changing the visibility of the most hostile political content can measurably dial down partisan heat without deleting a single post or asking the platform for permission.

Today, social media platforms hold the sole power to study the effects of feed-ranking algorithms. We developed a platform-independent method that reranks participants’ feeds in real time and used thi...