Water bear worms are also called water bears. They are commonly known as timid creatures. There are more than 900 recorded species, most of which are distributed worldwide. They are extremely small, the smallest is only 50 microns, and the largest is only 1.4 mm, you must use a microscope to see it clearly. Water bear worms are the most powerful living creatures on the planet. They can survive freezing, boiling, and air-drying. They can even survive in a vacuum or under radioactive rays. Putting it back into the normal environment can still return to the normal state. The text is intended to explain:. ['Water bear worms are phytophagous creatures with a wide variety and wide distribution.', 'Water bear worms are very small, making them easy to survive in extreme conditions.', 'Water bear worms are extremely viable and can survive in extreme conditions.', 'Water bear worms can slow down or stop their metabolism for a long time.']