Does that humans have to combine work with rest indicate that humans are degenerating?
In the nature, every species learn survival skills from their parents shortly after they are born. They can smoothly apply what they have learnt to practice. They dare not loosen or rest, except for sleeping. Once they rest, their enemies may come and kill them. As for them, rest is not necessary. They don't need to combine study with rest. And continuous study doesn't harm their health at all. However, humans like to combine study with rest very much. An absence of rest makes them unable to study and may harm their health. They cannot smoothly apply theories to practice as well. Why is this? Are humans degenerating?