A team led by the National Human Genome Research Institute today announced the discovery of the genetic basis of a disorder that causes the most dramatic form of premature aging, a finding that promises to shed new light on the rare disease, as well as on normal human aging. In their study, to be released online next week in the journal Nature, researchers identified the genetic mutations responsible for Hutchinson-Gilford progeria syndrome (HGPS), commonly referred to as progeria. Derived from the Greek word for old age, “geras,” progeria is estimated to affect one in 8 million newborns worldwide. There currently are no diagnostic tests or treatments for the progressive, fatal disorder.