If your floor really needs more than that, consider a low-cost alternative to refinishing: Apply a fresh topcoat of nonyellowing polyurethane, found in the flooring section of a home improvement store. Be sure to very lightly sand the floors with a pole sander and fine-grit sandpaper.
There are 440 different species of sharks in the world today classified into eight different orders described below with some examples of known sharks species for each group.
According to the International Shark Attack File (ISAF), 1,909 confirmed shark attacks have occurred around the world-between 1580 and 2003! Of these, 737 happened in the United States, and 38 people died as a result.