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Double-bit axes had two edges—a sharp one for cutting trees and limbs, and a duller one with a shorter taper for splitting firewood.
Significantly, the handles of double-bit axes were straight rather than curved.
When it comes to determining the age of stuff scientists dig out of the ground, whether fossil or artifact, “there are good dates and bad dates and ugly dates,” says paleoanthropologist John Shea of Stony Brook University.
These methods — some of which are still used today — provide only an approximate spot within a previously established sequence: Think of it as ordering rather than dating.
Biostratigraphy: One of the first and most basic scientific dating methods is also one of the easiest to understand.
In a recent survey , large number of late Acheulian, middle Palaeolithic and Microlithic tools were examined at various sites in eastern Rajasthan by a team of archaeologists from Sahitya Sansthan, Janardhan Rai Nagar Rajasthan Vidyapeeth, Udaipur accompanied by historian Om Prakash Sharma of Bundi.
The survey , supported by Vidyapeeth University , was carried out to have clear concepts of chronology , distribution and nature of Stone Age settlements in this region since some of them had been noticed already .