pin_gween writes "The Mercury News has an AP wire that shows science uncovering history. 800 years ago a monk scrubbed the text off a goatskin parchment to write prayers. Nothing unusual there, except the parchment contained writings from a copy of Archimedes' Palimpsest. Now scientists are using x-rays, generated by a particle accelerator, to cause tiny amounts of iron left by the original ink to glow without harming the delicate goatskin parchment. It takes 12 hours to scan one page, then the information is posted online."
I've never been canoeing before, but I imagine there must be just a few
simple heuristics you have to remember...
Yes, don't fall out, and don't hit rocks.