Arrow Boomerang throwing stick Bow and arrow history Nets Spear Spear-thrower baton harpoon woomera Schöningen spears. The burden on African archaeologists became all the greater, because now they must find the missing transitions in Africa.

An ice age is a period of colder global temperatures and recurring glacial expansion capable of lasting hundreds of millions of years. If transitions do not exist, then there is no proof of any continuity between A and B. Views Read Edit View history.

Timeline of the history of Scandinavia. New Haven: The latter seem to derive their form from Mesolithic weapons of antler, but their splayed blades disclose the influence of metal forms.