Why are tardigrades nearly indestructible?

The answer

Tardigrades, also known as water bears, can survive temperatures ranging from -272 degrees Celsius (near absolute zero) to 150 degrees Celsius, pressures six times greater than the deepest ocean trench, and radiation hundreds of times the lethal dose for humans. They achieve this by entering a state called cryptobiosis, in which they expel nearly all water from their bodies and produce a glass-like protein called Dsup that shields their DNA from damage. Tardigrades have even survived exposure to the vacuum of outer space, making them one of the most resilient organisms ever discovered.