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.
Â· just now. 1  The smallest planet we know about is Mercury, the closest planet to the sun. 2  Well no one knows what the smallest planet in the Universe is because it's so vast. 3  Yes, Mercury is the smallest planet in our solar system. 4  No idea what the smallest is in the universe. 5  No way to answer. 6  Simple - planet B612. 7  Nobody knows.