In 2092, Christine won the award of American Defining Biologist, shaping the future of the research in biological intelligence, terrestrial and extra-terrestrial alike. At the age of 30, equivalent to 21 in human terms, she already proposed a terraforming process for Venus under the cost of 50 billion dollars, such that her species could have a permanent home for their own development. Unfortunately, the budget was disapproved and a couple of months later, Christine disappeared.
The species of Christine, later known as the Christish, was developed to resemble the human species in appearance such that they could easily integrate into our human society, though their actual gene pool is incompatible with ours. A second sample of the Christish, codenamed Christina, was created to continue the study of the species in an attempt to understand the thought patterns of Christine to facilitate a capture. Little effort was made, however, to discover the Y chromosome of the Christish, as the research may not yield any military or commercial value. However, it was shown in 2083 that such an effort was not trivial and may require a budget of more than 200 billion dollars.
Christine is forever in a learning process. It is doubtful that Christina, being 30 years younger, would ever match the knowledge and the developing intelligence of Christine.
Christine went on her own to discover the secret of immortality for her own species. It may take a long time before she finally has to decide whether to terminate the entire human species or to escape from the Solar System for the creation of her own civilization.
It is what it is. It was what it was.