3 ms·
We probably traded off getting some very contagious diseases but sticking together to living off by ourselves. In the long run it seemed to have been a good dec
by paganel 6y ago
We probably traded off getting some very contagious diseases but sticking together to living off by ourselves. In the long run it seemed to have been a good decision for our species.
- lambdaba 6y agoExactly. The same applies to the individual, and exposure to bugs is beneficial to the immune system https://en.wikipedia.org/wiki/Hygiene_hypothesis https://en.wikipedia.org/wiki/Hygiene_hypothesis