From: Diana Matthiesen Sent: Saturday, March 24, 2012 1:53 PM To: y-dna-haplogroup-i@rootsweb.com ; knordtvedt@bresnan.net Subject: RE: [yDNAhgI] PhyloTrees and Time A time-axis is implied in all evolutionary cladograms, and it isn't necessary to scale the time axis — by scaling the lengths of the branches — unless the time scale is of interest to the researcher. [[Yes, the time scale and estimated dates of key nodes is of primary interest to this researcher --- that's why my original message to emphasize the distinction between tree types. KN ]]