Overview
- A team from the University of St Andrews and Dartmouth published a paper in Proceedings of the Royal Society B proposing a 'fireside' social niche as a driver of spoken language; lead authors include Catherine Hobaiter and Nathaniel Dominy.
- The authors argue control of fire extended wakeful social time by about four hours each evening, creating routine opportunities for non‑practical, narrative talk.
- They report that flame light contains almost no blue wavelengths and emits long‑wavelength infrared, which the paper says would avoid melatonin suppression and could offer photometabolic benefits; those physiological links are presented as hypotheses that need experimental testing.
- The study suggests the flicker of flames could entrain neural activity across listeners, strengthening empathy, social cohesion, and the rhythm of collective storytelling, but the neural‑entrainment claim remains a testable proposition rather than a proven mechanism.
- The paper draws on ethnographic recordings of Ju/'hoansi fireside storytelling and frames clear predictions—such as controlled light‑spectrum, hormonal and brain‑synchrony experiments—that researchers can run next to evaluate the hypothesis.