Interesting stuff from the scientists. I am forever amazed at how slow some evolution is, the types of freaky developments we have had on this planet, and how far back it all seems to go. New Study Supports Idea That Primates, Dinosaurs Coexisted By Ben Harder for National Geographic News April 18, 2002 Scientists have acquired new data supporting the idea that the last ancestor shared by all living primates walked with the dinosaurs more than 80 million years ago. The results came from a new technique used to reconstruct the course of animal evolution. Previously, opposing scientific camps estimated that the animal that gave rise to the primates lived as recently as 55 million years ago and as long ago as 90 million years. The newly proposed date is closer to the older end of the range. That's significant because the older estimate, which was derived from studies based on molecular genetics, identifies the earliest primates as contemporaries of the dinosaurs. The younger date, which was based on fossil records, represents a period after the dinosaurs had already become extinct. "Our results agree broadly with a molecular estimate [and] contradict widely accepted palaeontological estimates," Simon TavarÃƒÂƒÃ‚Â© of the University of Southern California and his colleagues reported in the journal Nature. Their finding sprang from a scientific collaboration that straddled the fields of biology and mathematics and spanned research centers from California to the Swiss Alps. Working with colleagues from Harvard University, the University of Washington, Chicago's Field Museum, and institutions in England and Switzerland, TavarÃƒÂƒÃ‚Â© used a novel mathematical approach to help answer a major piece of the evolutionary puzzle.