🐾 Why Big Dogs Age Faster: An Epigenetic Answer

🐕 Bigger Dogs, Faster Clocks, Shorter Lives?

A fascinating Science study analyzed 1,640 DNA methylomes from 894 dogs. 🧬 Epigenetic age predicted mortality, with each additional year of residual biological age associated with a 15% higher mortality hazard. Most strikingly, larger dogs showed 31% stronger age-related transposable-element demethylation, especially involving evolutionarily young LINE1 elements.

💡 Large dogs may not simply die earlier—their molecular aging appears compressed and accelerated.

A powerful natural model for understanding longevity, genomic instability, and human geroscience.