True, I remember reading that humans are the only animals that sweat. Some animals like hippos create thick oily sebaceous sweat but I don't think any other animals just spill water from their pores like us. That's what gives us such incredible endurance
I was intrigued by your comment, and did five minutes research,
Apparently you're half right - pretty much every mammal will sweat to some degree (its almost a defining feature of mammals - mammary glands are modified sweat glands) - but only a limited number of mammals sweat heavily, horses being another notable example.
