Yesterday I heard the following argument: the ice caps melting will not cause sea levels to rise because water expands when frozen and contracts when melted. I know there’s something wrong with this argument, but I can’t quite figure out what. Presumably the ice caps are actually displacing water? If anyone can enlighten me, please do.
Do you remember the old legend that the Great Wall of China is the only man-made object visible from space? It’s kak: the wall is made of stone from the surrounding rock so can’t be seen with the naked eye. Even if it were true, I can go one better (thanks to SciScoop for the link).