Spider veins are tiny, thin veins that can be seen very close to the skinâs surface. They look like red, blue, or green spider webs just beneath the skin. Sometimes they are also described as looking like marble. Spider veins are caused by a backup of blood. These become nonfunctional, âdead-endâ veins.
While the fairy fly is the worldâs smallest insect, there a few runners up! For example, the feather wing beetle is only .25 millimeters long. Some scientists think these beetles may even be smaller than fairy flies, but for now, the fairy fly is considered by many to be the âsmallest insect!â.
Farmers and scientists can use fairyflies to help get rid of bigger insects that damage grape vines, blackberries and sugar cane. These tiny creatures help us do a big job. The insect world is filled with interesting critters. Thinking about the smallest insect also made me wonder about the biggest one on our planet. The biggest bug is a giant walking stick. Itâs almost 2 feet long.