Water bears are the toughest creatures alive. They have been put through many tests such as radiation, extreme high and low pressure, and also exposure to outer space.
Water bears, also known as tardigrades are less that 1 millimeter in size.
Tardigrades are so small they can only be viewed under a microscope, a low powered microscope at the least.
Water bears can be found everywhere, including places like rainforests, volcanoes, underwater, and the anarctic.
Tardigrades feed on plant cells,algae,and small invertebrates.
