Counting the breaths of wild porpoises reveals their revved-up metabolism
In Danish waters, these small cetaceans have metabolic rates more than double those of humans
![harbor porpoise](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/12/120618_sm_porpoise_feat.jpg?fit=860%2C459&ssl=1)
JUST BREATHE A method that tracks harbor porpoises’ breathing helped scientists verify claims of high energy needs in the free-swimming mammals.
Peter Verhoog