A technique used to produce stone tools that were first found 500,000 years ago is likely to have needed a modern human-like hand,
according to new research.
The technique is called 'platform preparation' - preparing a striking area on a tool to remove specific stone flakes and shape the tool into a pre-conceived design - and without the ability to perform highly forceful precision grips, our ancestors would not have been able to produce advanced types of stone tool like spear points.
Platform preparation is essential for making many different types of advanced prehistoric stone tool, with the earliest known occurrence observed at the 500,000-year-old site of Boxgrove in West Sussex, UK.