Experts claim that sexual reproduction, primarily intended for genetic diversification, is not energy efficient, and therefore aliens apply other reproductive methods.
Assuming that aliens are not immortal, they are required to reproduce somehow. It is possible to produce different scenarios under different assumptions. Which makes more sense - judge for yourself.
- The entire alien species has a genetic bank of the relevant population. Fertilization is performed in vitro based on computerized matching. The "pregnancy" is performed in a computerized incubator without the need for a surrogate.
- Aliens require a surrogate (non-alien), and they "kidnap" females from all universes who are perceived as "technologically retarded" and thus pass on their genetic information. But such a scenario produces hybrids rather than aliens and is not very likely.
- Non-genetic improvement. Think of an alien undergoing a "computer version" update. According to this version, aliens are "cyborgs" (a hybrid of live and machine production). They do not need heredity; the improvement of the race occurs as an update of their core software.
Which of the options is more likely? Hard to know! If I had to gamble, I would bet on alternative number 3.
Continue reading the entire article: An encounter with intelligent aliens will change humanity completely.