Rodents

Marmots (genus Marmota) are the largest members of the family Sciuridae, which includes squirrels, chipmunks, and prairie dogs. Adult marmots typically weigh between 3 and 7 kg (6.6–15.4 lbs), with some species such as the steppe marmot reaching up to 8 kg. Despite their stocky build, they are agile climbers and runners on rocky mountain terrain.

These subterranean rodents exhibit extraordinary resistance to cancer, a unique trait being studied for human applications. They also lack substance P in their skin, making them insensitive to acid and capsaicin pain, a remarkable adaptation for their harsh environment.