Pictures of the day: 24 September 2012 A macro photo of a waterbear on moss. Tardigrades, commonly known as waterbears or moss piglets, are water-dwelling, segmented creatures with eight legs and measuring just 1mm in length. They are found throughout the world, including regions of extreme temperature, such as hot springs. They can survive extreme pressure, such as deep underwater. They can also survive high levels of radiation and can live in the vacuum of space for several days.Picture: Eye Of Science/SPL/Solent