Indo-European Language Tree 1

Indo-European Language Tree

Consensus tree and divergence-time estimates (in red). Majority-rule consensus tree based on the MCMC sample of 1,000 trees. The main language groupings are colour coded. Branch lengths are proportional to the inferred maximum-likelihood estimates of evolutionary change per cognate. Values above each branch (in black) express the bayesian posterior probabilities as a percentage. Values in red show the inferred ages of nodes in years BP. *Italic also includes the French/Iberian subgroup.

From Gray, R. D. and Q. D. Atkinson. 2003. Language tree divergence times support the Anatolian theory of Indo-European origin.  Nature 426: 435-439.