Daddy Longlegs

Spider's silk is made up of chains of amino acids. In other words, it is simply a protein (see How Food Works for details on… See more » Horseshoe Crab, a marine arthropod that lives in shallow water. It is also called king crab and helmet crab. It is not a true crab because it has a… See more » Spider, an animal closely related to mites, ticks, and scorpions. There are about 35,000 known species, more than 3,000 of them in the United States.… See more »