Your body clock is ticking, and scientists now understand its workings better. Ian Sample finds out how this knowledge could usher in a medical revolution.
Couples who have a baby born from a donated embryo are much less likely than those who adopt to tell the child the truth about its origins, but the secrecy does them no harm, according to a new study.
Drugs for Alzheimer's disease have little effect on patients' memory and do not stop the distressing deterioration of their lives, according to an important study published today.