Life span lengthens when mice feel less pain
Metabolism gets healthier in rodents engineered to lack a sensory protein
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/05/lm_D09C_2.jpg?fit=860%2C460&ssl=1)
NO PAIN, BIG GAIN Mice that lack the pain receptor Trpv1 live longer and have improved metabolism compared with mice that feel pain normally (one shown).
George Shuklin/Wikimedia Commons