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 ...

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 ...

Objective To synthesise the evidence on the effects of physical activity on symptoms of depression, anxiety and psychological distress in adult populations. Design Umbrella review. Data sources Twelve ...

The BMA resident doctors committee has announced industrial action from 7:00am on Wednesday 17 to 6:59am Monday 22 December 2025. Every effort is being made to avert this, and as part of this you will ...