Did we lose our ability to see in infrared light ? Or we never had it to begin with ? Does DNA mutations has to do something with it because some have blue eyes instead of brown and they say this is because DNA mutation happened only once in Europe somewhere.
Those animals who hunt in night need vision in infrared light. So, were they first night hunters and then developed vision in infrared (due to mutation in DNA ?) and stayed with them forever according to Darwin’s theory (survival of the fittest) or they realized they had infrared vision and so why not hunt in night only ?