The discovery and University of Arizona (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 years ago. This time predates the age of.
Scientists briefly revive extinct frog from dead cells
Scientists have successfully created an embryo from the extinct gastric-brooding frog. While it is only in embryo form, they say that the species will live again and possibly see other extinct animals restored as well.