Fig. (4) Tardigrade (A and B) and resurrection plant (C and D) can survive extreme drought in nature upon rehydration - a phenomenon called anhydrobiosis or life without water. Figure reprinted and redrawn from references [85,86] with permission from John H. Crowe at U of California-Davis (for panels A and B) and Wayne P. Armstrong at Palomar College (for panels C and D).