What is the immortal ‘water bear’ trapped on the moon?

What is the immortal ‘water bear’ trapped on the moon? - Photo: Collected It is not wrong to call the creatures of the earth immortal, but some of them can now be called the inhabitants of the moon. Tardigrades - also known as 'water bears' or water bears, are animals less than one millimeter long that can survive at temperatures of 150 degrees Celsius, as well as zero degrees.