No one wants to read a book about murderous stalkers when they have been finding footprints in the bushes outside their bedroom window. I don't want to turn my face from a broadcast about COVID-19's death toll and open to a chapter about failed containment in World War Z.
I wouldn’t get your hopes up that human eyes will be around to see what an Earth 50,000 years older will look like.
Kepler spacecraft observations indicate 20 billion habitable planets in our galaxy alone. What does that mean? Could humans someday infest 20 billion different planets?