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.
1. Three-toed Sloth. Image by Christian. The Sloth is the slowest animal in the world and the name sloth is actually a synonym of slow motion. The top speed of a sloth is 0.003 miles per hour they are so slow algae grow on them.Source: Animal Icons â Slowest Animals in the World.mage by wiki. In 8th position of these top 10 slowest animals in the world belongs to the Nematodes. These arenât the same things from SpongeBob. These microscopic worms feed on bacteria and are so slow they have to wait for the food come to them.