Diplopoda, commonly known as millipedes, are a class of arthropods characterized by their long, segmented bodies and numerous legs. Unlike their name suggests, millipedes do not have a thousand legs; they typically have between 30 to 400 legs, depending on the species. They are usually found in damp environments, such as forests and gardens, where they play a vital role in breaking down organic matter. These creatures are primarily detritivores, meaning they feed on decaying plant material, which helps enrich the soil. Millipedes have a cylindrical body shape and can be recognized by their two pairs of legs per body segment. While they are harmless to humans, some species can secrete toxins as a defense mechanism against predators.