Human Y Chromosome Much Older Than Previously Thought

By Daniel Stolte,      University Communications |             March 1, 2013

The discovery and UA analysis of an extremely rare African American Y chromosome pushes back the time of the most recent common ancestor for the Y chromosome lineage tree to 338,000 years ago. This time predates the age of the oldest known anatomically modern human fossils.Continue reading

UA Study: Relief of Pain is a Reward

The Pain Research Group at the UA College of Medicine-Tucson studies the underlying causes of acute and chronic pain to promote the discovery of new targets for drug development with the ultimate goal of improved pain management.

By Jean Spinelli,      Arizona Health Sciences Center |             November 26, 2012Continue reading