The linguistic clock — the comparative method dates the dispersal

The same history is written in the words. The comparative method reconstructs ancestral tongues from their daughters (sealed in the language-evolution wing), and glottochronology's exponential vocabulary decay gives a rough clock — 47% of basic words shared after five millennia, sealed (https://narrowhighway.com/s/222afa501ad9a65a6cbb50011690b7b5363cc002934bf367eac99bf946b5774b), a ~4,595-year half-life sealed earlier. Loanwords date contact; place-names fossilize vanished peoples; the spread of Indo-European — English to Hindi to Persian — maps a migration as surely as a haplogroup does. Computational phylogenetics now dates language trees with the same Bayesian math biology uses for genes. Run independently, the linguistic clock and the genetic clock draw congruent maps. Honest: the rates are HEURISTIC and perturbed by contact — a trend, not a law. RESONANCE with the genetic clock; the words remember the road.