A mother's quest to cure her son

Researchers have discovered a link between circadian rhythms and Angelman syndrome, a genetic disorder which inhibits brain development leaving its victims unable to speak while suffering from seizures and sleep problems. The link between the biological clock and Angelman's could prove to be a powerful tool in the search for treatments and a possible cure for the disease. Its discovery was made in part by a mother who has sacrificed everything in order to try and help her son. Ben Gruber has more. Credit to Reuters.