> They were already excellent at survival, and they migrated, and many of them died young. Sure, _humanity_ will survive, but a large part of the population won

> They were already excellent at survival, and they migrated, and many of them died young. Sure, _humanity_ will survive, but a large part of the population won't. Hence the egregious exaggeration of the title. Even large fractions of the population dying != "Bye Bye Humanity."