This week’s science roundup covers 2025’s near-record heat, a new mpox strain and fresh clues about why hobbits vanished 50,000 years ago. Journalist Karen Hao unpacks the rise of AI “empires,” their ...

Condensed-matter physics is the study of substances in their solid state. This includes the investigation of both crystalline solids in which the atoms are positioned on a repeating three-dimensional ...

This study examines how multimodal large language models evaluate hate speech. Larger models can make context-sensitive decisions aligned with human judgement. However, pervasive demographic and ...