Immortality Drugs
The finite lifespan of mammals is one of the Earth's great tragedies. Virtually all the other animals secrete molecules that rearrange their cytoskeletal structures on a regular basis and cure their fungal infections. Birds, for example, secrete a substance that interferes with the microtubules that interlace the body and causes them to constantly rearrange themselves. It also interferes with fungal cell walls, leaving the organism relatively free of the mycelium that would otherwise colonize its entire body structure. This adaptation gave the dinosaurs and their avian descendants an effectively limitless lifespan. Mollusks, arthropods, turtles, sharks and crocodiles all have similar strategies. Their lifespans are limited by predation rather than aging. When an organism achieves great age, certain troubles arise, the most prominent being the lack of telomeres. Telomeres are repeating DNA sequences on the ends of chromosomes that are necessary...