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 Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to 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.