Satellite observations of solar radiation have narrowed down the possible properties of dark photons — a proposed dark-matter particle.

Some types of cell are more likely than others to give rise to tumours. A rapid cell cycle is a newly identified predictor of cancer susceptibility.

The spatio-temporal evolution of inflammatory bowel disease across the world follows four epidemiological stages: emergence, acceleration in incidence, compounding prevalence and prevalence equilibrium. Classifying regions by epidemiological stage enables health-care systems to prepare for the evolving global burden.

Ancient and present-day genomes from members of the Indigenous American tribe Picuris Pueblo in the US Southwest show genetic continuity with Ancestral Pueblo individuals from the Chaco Canyon, New Mexico. These results confirm traditional knowledge and contest previous accounts that suggested that the population in the region collapsed before European colonization.