Exploring a newly discovered universe of microproteins
Mitch Leslie writes: Mice put human runners to shame. Despite taking puny strides, the rodents can log 10 kilometers or more per night on an exercise wheel. But the mice that muscle biologist Eric Olson of the University of Texas Southwestern Medical Center in Dallas and colleagues unveiled in 2015 stood out. On a treadmill, the mice could scurry up a steep 10% grade for about 90 minutes before faltering, 31% longer than other rodents. Those iron mice differed from…