Stone-age ‘likes’: Study establishes eggshell beads exchanged over 30,000 years
ANN ARBOR--A clump of grass grows on an outcrop of shale 33,000 yrs in the past. An ostrich pecks at...
ANN ARBOR--A clump of grass grows on an outcrop of shale 33,000 yrs in the past. An ostrich pecks at...