hmmm....
A few years ago I read an article in a local newspaper about the day x, the fictional day when the human race abruptly dissapears. It was quite interesting to read. They made a forecast for how long traces of the human race would be seen on earth in the case of a sudden extinction.
But in fact it doesn't really matter.... We won't see it....
A novel based on this issue would be very interesting. Aliens visit Earth and find technology from a species that lived long ago......
Just daydreaming....