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.
The scientists behind the report, published in the journal Marine Policy, added that the number of sharks killed could be anywhere between 63 million and 273 million, staggering figures that experts say could drive many shark species to endangerment or even extinction.