astonishing!

amazing finding.
"overwriting", same as i am doing overcopying on VHS video tape.
skwirlinator, i found out about the imaging technology used to read what was overwritten.
The "multispectral imaging developed by NASA so that telescopes could see through
space dust and gases to peer further into the cosmos. The method involves taking
multiple images of the same subject using different light wavelengths".

I read about that a few years ago when I was all infatuated with the hubble pictures. I had a couple megabytes of pictures for wallpapers but now I have only a black background and I'm pretty content with that.

Cool!