I saw a news report about researchers at Case Western Reserve University who have genetically altered mice to make them run faster and longer. The link below goes to a video that shows a genetically engineered PEPCK-C mouse and a mouse from the control group on a rodent treadmill. While the normal mouse gives up at 0.2 kilometers, the mighty mouse perseveres for almost 5 kilometers, at 20 meters per minute.

[youtube:http://youtube.com/watch?v=kGrdsedQB9o]