After the Crisis, everything changed. We, the humans, managed to destroy this planet. We did not leave any life untouched.
However, as Mother Nature would have it, she is the one who does all the bidding.
We wish to control her, but she is our master. We wish to create it, but she is our creator. We wish to destroy it, but it is her for whom we exist.
The more we tried to control her, the weaker we became. When we decided to get out of this bond by a mass nuclear destruction that killed all signs of living, she sheltered two of each species, one female and one male.
However, the last humans and their offsprings had to pay the price of what their species had done.
She reversed time.
Not in the way, you think she did.
We tried to defy her by controlling the order of death.
We wanted to know when our end would come.
Therefore, she gave us that chance.
We received the exact date when the world would end
That was year 5000.
It is year 2.
All Life would end in two years.