The answer to this question may stem from the completely different social structure of aliens and humans. These aliens may have taken a completely different evolutionary route from humans. Based on their appearance, saprophytic and oviparous characteristics, it is speculated that they may have evolved from alien insects. So we assume that their social structure is also similar to some social insects, such as ants and bees. So the doubts in the film can be reasonably explained. These aliens who have fallen to the earth play roles such as worker ants and worker bees in their society. They are responsible for driving the spacecraft to gather resources in the universe and then transport them back to the home planet. In their race, their intelligence may be relatively low. All of their actions are to support and protect a few elites in the group, which is similar to the role of queen bee and queen ant, they are located in the distant home planet. Unlike human beings, these creatures are very social, each has clear responsibilities and division of labor. Together, they are a very powerful race that can have a high degree of civilization and technology, but each individual individual may not be comparable. How clever humans are. Therefore, when these aliens are separated from the group, they immediately become aimless and become a disc of sand. This is why they stay on the earth for 20 years. The aliens who have lost their sociality are inefficient. Therefore, they cannot organize large-scale resistance or self-rescue actions against human beings. However, according to entomological theories, when such a group loses its leader for a long time, some of its individuals will transform into the form of queen bee under the influence of group signal hormones, which probably explains the existence of the later alien scientist and genius alien boy. .
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