Moss piglets, also known as tardigrades, are tiny, water-dwelling creatures that measure about 0.5 millimeters in length. They are known for their resilience and can survive extreme conditions, including high radiation, extreme temperatures, and even the vacuum of space. Moss piglets inhabit various environments, including moss, lichens, and leaf litter, where they feed on plant cells, algae, and small invertebrates. These microscopic animals have a unique body structure, featuring eight legs with claws. Moss piglets can enter a state called cryptobiosis, allowing them to effectively shut down their metabolism and endure harsh conditions. This remarkable ability makes them a subject of scientific research in fields like astrobiology and environmental science.