A wearable bioelectronic device increased REM sleep in real-world trials without invasive surgery or medication. A restless night can leave more than fatigue behind. REM sleep plays a central role in emotional processing, stress adaptation and mental recovery, and persistent disruptions to this stage have been linked to conditions including depression, anxiety and post-traumatic stress [...]

Wild chimpanzees in Uganda split into two separate communities and later engaged in deadly attacks against each other. Researchers believe the conflict shows how social relationships alone can fuel polarization and violence. The world’s largest known community of wild chimpanzees has permanently divided into two separate groups. Researchers from the University of Texas at Austin [...]