Ancient DNA reveals that the ancestors of modern-day Native Americans had European roots. The discovery sheds new light on European prehistory and also solves old mysteries concerning the colonisation of America.
Is it possible to predict whether a child will develop cancer in adulthood? It sounds unlikely, but a new study indicates that tall boys have a greater risk of developing prostate cancer when they grow up.
Scientists have identified a gene that helps trigger asthma attacks in children. The gene has no effect on asthma in adults. The discovery thus confirms the hypothesis that ‘asthma’ covers a variety of diseases.