And when they do, the new Puma Speedcat OG ‘Alpine Snow’ will be the go-to shoe for many of you out there. For the ‘Alpine Snow,’ the upper is now completely covered in creamy suede.

In the study, the authors scanned skulls of red and arctic foxes (from the Canidae family) and lynx and puma skulls (from ... of mice or other animals beneath the snow's surface, thereby gauging ...