How do tardigrades survive extreme conditions that would be lethal to most other life forms?

Tardigrades, often referred to as water bears, have fascinated scientists due to their incredible resilience. These microscopic creatures can endure extreme temperatures, radiation, and even the vacuum of space. They achieve this through a state known as cryptobiosis, where they lose almost all their water content and slow down their metabolism to nearly undetectable levels. As research continues into their biological mechanisms, scientists hope to uncover insights that could lead to breakthroughs in fields such as medicine, astrobiology, and biotechnology. What specific cellular processes grant these tiny organisms their remarkable survival abilities, and how might these insights be applied to enhance human resilience?