Threatened arthropods United States, and IUCN Red List for international purposes. Only a tiny fraction of the planet's endangered arthropods are formally recognized as such, as no one has ever evaluated the conservation status of the vast majority of arthropod species. It is difficult to estimate the total number of endangered arthropod species, since many of the taxa themselves have not been recorded. For example, in North America the estimated number of insect species exceeds 163,000, of which only about two thirds are taxonomically known. An even greater discovery awaiting, over 72 percent of North American arachnids are yet to be named
Slippery eight loop Slippery eight loop The slippery eight loop is an adjustable loop knot discovered by Dave Poston in 2002. The slippery eight loop is known — despite the name — to have an extraordinary ability to "not" slip and it is extremely secure when the legs are at less than a 90 degree angle. The man who created this knot, Dave Poston, requests that the name of the knot include the HFP in order to honor his father who originally introduced him to knots. So the whole name of the knot would be the "HFP Slippery 8 Loop." The instructions on