Zygentoma is an order of small, wingless insects commonly known as silverfish and firebrats. They are characterized by their elongated bodies, long antennae, and three long tail-like appendages. These insects are typically found in dark, damp environments, such as basements and bathrooms, where they feed on starchy materials like paper, glue, and textiles. Zygentoma are ancient insects, with fossils dating back over 400 million years. They are nocturnal and move quickly, making them difficult to catch. While they are not harmful to humans, their presence can indicate moisture problems in a home, as they thrive in humid conditions.