A new report suggests that the frequency of 'mitoflashes' on the pharynx of C. elegans in early adulthood is a good predictor of lifespan.  Fewer flashes = longer lifespan.  Unclear exactly what people think a mitoflash might be (ROS? H+?), but a very interesting predictor nonetheless.  Will also be interesting to see how mitoflashes might relate to the activation of the mitochondrial UPR, which recently has also been linked to aging.