Once during a time before this time there was an advanced group of people living on what is now called earth. They were advanced enough to be in the beginnings of off world flight and living for extended ages in the quite of space. These people had several colonies on outer planets and were mining comets for iron to build fantastic ships that would support large colonies for ages in flight to other galaxies.
By the time they had 3 expeditions launched the earth was pretty depleted of those who were capable of living off planet even with their work in the nano-health sciences making the remaining population live longer and healthier, the greatest of their minds had opted for the grand travel in search of new worlds and higher learning.
As the last, as it turned out, star ship was leaving the galactic boundaries it learned of a catastrophe about to send solar debris toward earth in a massive wave that was more than the inhabitants could overcome and an almost complete annihilation of life on earth would happen but because they would be drawn in and also destroyed if they tried to reverse course to help, they stayed their course and the ships leader General Odessa Davis sent word to the other outbound vessels of the destruction and that he and his crew would go into dormancy except for the AI and robots who could carry out advanced scientific studies that could be fed into the human bodies as they rested in stasis and would come out after a period of time when it was again safe to venture back to help what ever was left of society in the solar system.
After many eons Davis was awakened, fully rejuvenated by the internal bot-medics, his DNA advanced and most known human physical problems dealt with. His crew as well had been resurrected to a much advanced state of physical ability. The AI was far advanced but still willing to be part of "The new humanity".
On returning to Earth they found all the outposts along the way had suffered total annihilation and only Earth was left with life but not human in nature. Only larger land animals and ocean creatures lived well but were in an altered state from the creatures who the space dwellers had left behind before the destruction of the planets they knew as home.
The land masses had turned under in the violence and no sign of the former intelligence was in evidence beyond things that were rusting beyond recognition or were soon to be abducted under the volcanic eruptions still roiling upon the surface.
General Odessa Davis' crew was small compared to the other colony ships human cargo but it had wide diversity in genetic standing. It was agreed that a new human society was to be created on this "New" Earth and their ship would explore the outer reaches of this galaxy while Earth naturally built itself with no artificial intelligence help.
Science Administrator Thomas Alvin Nester was assigned to find suitable earth hosts for DNA from the ships ancient cold storage to start the new humans on the planet. A few examples where gathered from warm blooded species that could simulate human form though not so close as to copy human form as it was in the past and the most dangerous animals that would be a hazard to these prototype "New lifers" would be eliminated using low tech asteroid bombardment which would also rearrange the world to have more water segregated continents for the experiment to give more chances one would work in favor of a new society that would eventually be allowed to carry on the work of the ancients in outer space while giving diversity to the human body form.
S.A.Thomas A. Nester or as his suit tag read S.A.T.A.N. was told to give the subjects only pure original DNA because G. O. Davis wanted Independent natural growth before any advanced knowledge was invested in this new human experiment. But Nester thought he knew more about science and what should be the new form of things than the General and allowed advanced knowledge to be added. With that he gave a memory of their creation to each separated group along with implanted knowledge of mathematics that would kick in after certain time periods of earth time and to hide it he made it only activate after some integration of groups when the different DNA groups mixed.
G. O. Davis found out this secret plan against his directives and sentenced S.A.T.A.N. to be marooned on the planet with all nano-tech stripped from his body and his DNA corrupted so death would take him before he could devise a way to live past his time on earth.
G.O.D. then turned to his work of searching for more stable environments to bring any suitable life that may survive to intelligence on Earth.