No matter how fantastic it may sound, the aliens did not become invaders. They didn’t wrap up and go, leaving humanity to stomp at the three-path stone. From the very beginning, the zirks made it clear that they would not claim power and resources. But they would not let the current Coalition do the same mess as before. They didn’t settle in human cities. There were no zirks promoted to the high-ranking posts, but their presence was felt in everything: in bizarre forms of residential and industrial complexes, in programs lobbying for environmental protection, non-exhaust mechanical engineering, non-waste industries, unique air ventilation systems, water purification, and other things. Like Prometheus, who once gave fire to humans, they were ready to give humanity a lot, asking in return only prudence and non-impediment.

Not all alien guests remained on Earth, most of the ships left the atmosphere a couple of years after landing, the rest descended underground, into equipped hangars. About a couple of tens of thousands of green individuals stayed on the planet. Artificially built Biosphere islands became a kind of neutral territory, where humans freely contacted the zirks, and served for the sake of science – the major buildings on the Biospheres were universities, training centers, and research institutes. Zirkaazte shared their knowledge, accepting students of the human race, teaching truths both known on Earth and new cosmic laws, which can only be comprehended by plowing the vast expanses of the great Universe.

For a while, everything came to order and fell into place. The world grew, developed, becoming the same as before, but better. By the year 3000 on the old calendar, or by 130 after the reboot of the Earth, the world's population was about two billion people; five hundred thousand accounted for the Biospheres. Ancient North America, Asia, and Africa were partially rebuilt and newly populated. However, centuries later, a new problem arose.

Despite the fact that the Earth was rejuvenated and all resources were again in abundance; democracy and pacifism flourished—the problem of extinction did not completely disappear.

It probably wasn’t the best decision to go against God's plans.

So, in the year 625 AR, the androgenesis trend was noticed and later officially announced or, putting it simply, the birth rate of girls had sharply decreased.

Of course, the alarm was sounded by the Zirkaazte. All statistics on the Earth’s species population, not only humans but also butterflies, penguins, and plants were carried out very meticulously and mainly by the zirks. The problem was approached from all sides of science by deploying a full-scale, long-term study of the phenomenon.

The ova of all fertile women were collected for analysis. The genomes of young girls, adult women, representatives of different races and parts of the world were compared. Men were also not deprived of attention. For several years, every human being has literally been subjected to thorough examination regarding the conditions of food, accommodation, ecology, medical, and all other influences possible. Experienced scientists of both the Zirkaazte and humans were brought in to investigate the unexpected riddle.

The results were not particularly encouraging – the X-chromosomes of men and women were no longer able to link in the process of release from pronuclei, so only the Y-chromosome entered the fusion with the maternal one. The number of women was catastrophically reduced, but no solution was found. Years passed—decades passed...

Then, the Coalition was presented with an unexpected, incredible, and simply fantastic idea by a friendly Zirkaazte colony.

“... This is what we’re experienced in and this is how we will help you...”

And the work began.

It was essential to break the process into several phases. After all, you can’t just take the female uterus and insert it into a male’s body. The organ will not work properly if there’s noting that switches it on, supports and controls it.

They planned to study chemical triggers in extreme close up and synthesize evolutionary hormones that could be passed from mother ... to son. The hormone was responsible for the production of ova in males.

The idea was supported and accepted, although, given the worldwide panic, humans would have supported anything, even if it sounded more impossible. For implementation, scientists from Earth and Sirkazai were involved. It happened just on the verge of fiction. They had to work on theory, building sequences of probability, in other words, drawing diagrams with a pitchfork over water. And to work on their research with permissible speed – there were fewer and fewer women each year.

The first phase began 200 years later, during which scientists worked tirelessly, passing on all the accumulated knowledge to the next generation, who came to replace them, igniting the idea of saving the human race. Within the first few years of the 9th century, the implementation of m-estrogen began. Five years was devoted to studying the susceptibility of homosapiens.

The hormone was introduced into the genome of a control group of young women who volunteered to take part in the experiment. In the 20s of 9th century AR, after several years of unsuccessful trials and despair, children, whose bodies were capable of producing m-estrogen, began to be born. They were closely watched and supervised since birth, during their childhood, and throughout life while continuing to get things ready for the second phase.