Tardigrades survive being dried out thanks to proteins found in no other animals on Earth

Tardigrades can enter cryptobiosis to withstand temperature and moisture extremes.
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Tiny tardigrades can survive conditions that would kill most other forms of life. By expelling their body’s water and transforming into a seemingly lifeless ball called a tun, they enter a state of dried-up suspended animation in which they can survive for decades without food and water and withstand extreme temperatures, pressures and even the vacuum of space. However, little is known about what drives this protective mechanism and what keeps tardigrades from succumbing to the stresses of prolonged desiccation. 

Now, a new study reveals how tardigrades survive without any water at all: Unique proteins turn the insides of tardigrade cells into gel, thereby preventing the critters’ cell membranes from crinkling and collapsing. This strategy is completely different from those seen in other types of animals that can survive dry periods.

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