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.
The Porcine circovirus 2 is a single stranded DNA virus having a capsid diameter of 17 nm. In which that case, the smallest living organism in the world would be a nanobe. Nanobes are thought by some to be the smallest known organism, about one tenth the size of the smallest known bacteria. What is the smallest grassland on earth? I think it is the pampas in the south American desert.