Predicted by some mad scientist from the last century.
Humanity has two endings. Normal end: surviving and the earth becomes a desolate place where humans can barely survive. Bad end: human beings are destroyed and the earth gradually repairs itself.
Devastated by natural and man-made disasters, and under the Ice Age, mankind seems to be slipping into the bad end.
Some people believe it
There is a third ending, a true end.
Intention: The fire of civilization will continue.