The Practical Visible Role of Philosophy (c).
The origin of humanity.
The evolution of animal bodily functions evolves in two directions, one is active feeding and predation, and the other is evading natural predators. The evolution of bodily functions, with the change of space, evolves the ability to adapt to the new environment and the ability to adapt to the new environment, all in order to better survive.
Herbivorous animals with large colonies migrate with the cyclical changes of the rainy season, moving from water to water. Predators are generally territorial, guarding their territory and the prey on it. Herbivorous animals are agile, fast, have good endurance, and have well-developed incisors, and newborn cubs can run in a very short time. Predators mostly have night vision, some have good explosive power in short-distance running, most of them are intolerant of long-term running, canine teeth are developed, and newborn cubs are basically lying on their stomachs and are weak, because they are at the top of the food chain and are fearless. Most crypt animal pups have a safe shelter and do not have the need to run for a short time. Therefore, animal cubs with a sufficient sense of security are relatively weak and helpless. This also explains why human cubs are also so weak and cute.