The 12 Mile Creek site in western Kansas was the first site yielding a fluted projectile point to be excavated in North America by scientific personnel. The Bison from this kill site were used in forming the original concept of B. occidentalis . A new study of the site including radiocarbon dates and a pollen analysis suggests the kill took place in a pine parkland about 10,300 years ago. The artifact from this site reported by Williston seems to be a Clovis projectile point.
The search for the antiquity of erosive arthritis was the subject of an international conference (1). Although isolated examples have been reported from the anthropologic record (2, 3), systemic population studies have represented a newer approach (4). Recognition of erosive disease, osteoarthritis and DISH, as isolated observations, does not allow perspective with respect to population significance...
We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero.