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.
What is the smallest mammal on earth? A: There are two contenders for the world's smallest mammal, depending on whether one is going by length or weight. The world's lightest mammal is the Etruscan shrew, while the shortest is Kitti's hog-nosed bat. Continue Reading. Credit: Joey (aka Lens Wide-Open Photography) Flickr CC-BY-2.0.