Scientific work on this topic was prepared by specialists from the University of Oxford, according to the portal of the independent scientific publishing house Mary Ann Liebert. As an argument for their position, the experts cited the development of life on our planet as an example. So, according to scientists, the appearance of the nucleus in the cells took almost a billion years, which makes this very stage extremely unlikely. At the same time, they also noted that multicellular life has evolved on Earth in independent conditions at least 40 times. This makes the transition from unicellular to multicellular eukaryotes a fairly likely development of events.
Experts also call time as restrictions on the development of life. Most of the stars that can "boast" planets in their habitat have a stable lifetime in the region of 6-12 billion years. Thus, “intelligent life” can count on only a few attempts at education, if exhausted, it will simply have no chance.