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.
There's something very special about the Great White Shark. Over 465 species of sharks are known to Science. Each and every one of them is fascinating in its own way. Yet in the public's imagination, one shark species looms larger than all the others combined. The Great White is a veritable 'superstar' among sharks.