The National Cancer Institute has announcing research on progeria (a premature aging disease) in mice that reinforces the genetic findings for human progeria last month. With the ability to study the condition in mice, scientists should be able to make faster use of this information. Tests of gene-based therapies in mice lead fairly directly to medical trials in people. Understanding of progeria will lead to a cure for this horrible condition. Beyond that, there is also the tantalizing promise of greater insight into the normal mechanisms of aging.