Coloured scanning electron micrograph (SEM) of a Echiniscus granulatus tardigrade, or water bear, from a moss sample from the Northern Black Forest National Park, Germany. Tardigrades are tiny invertebrates that live in aquatic and semi-aquatic habitats such as lichen and damp moss. They are found throughout the world, including regions of extreme temperature, such as hot springs, and extreme pressure, such as deep underwater. They can also survive high levels of radiation and the vacuum of space. This species is herbivorous, feeding mainly on moss cells. Magnification: x550 when printed at 15cm wide.