News Animals Dangerous Times: Guppies don’t follow rules for old age By Susan Milius October 28, 2004 at 7:12 am - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print A new study of wild guppies could unsettle a decades-old idea about the role of danger in the evolution of aging. GUPPY SUPERGRANNY. Pictured shortly before her death, this guppy reached the age of 4 years and 64 days. D. Ghalambor Biologists in the 1950s predicted that in a treacherous habitat, creatures would evolve so that they’d age rapidly, explains David N.