Part 3/7:
Human beings are equipped with 2 to 4 million sweat glands, allowing us to regulate our body temperature effectively, which is essential for long-distance running. The lack of fur contributes to our cooling ability, unlike other animals like dogs, which can only pant to manage heat.
Additionally, our unique anatomical features—flexible necks for balance, specialized hip structures for efficient leg movement, and connective tissues like the Achilles tendon—make us natural long-distance runners. Experts suggest that this endurance capability enabled ancient humans to track prey over long distances, asserting their survival as hunter-gatherers.