>We could probably come up with a better system using a tree coordinate system. I'd suggest having ones that count from origin, and other that count from prese

>We could probably come up with a better system using a tree coordinate system. I'd suggest having ones that count from origin, and other that count from present, so the current extant species would be +1, LUCA would be -1. Eukaryot? count from origin, Beagle? Count from present.