Extending over 6,000 kilometers across China, the Great Wall of China was built to protect china from the barbaric enemies of the north. In that era the designers of the wall made it so high it could not be scaled, so long no one could go around it, and so thick you could not go…
Things just do not last forever do they? Our cars wear out, our roofs need replacing, our bodies grow older. Strangely enough, even nuclear waste does not stay hazardous forever,. In this 12 page Greenpeace document it mentions that plutonium will eventually be considered safe in 240.000 years. Until then it has to be isolated…
My Sunday Blog 