The pictures illustrate the changes in stony cutting implements between 1.4
million
Use synonyms
years
ago and 800 thousand Use synonyms
years
ago. As shown in the graphs, the back, front and side views can be clearly seen.
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Overall
, it is apparent that the size of Linking Words
this
Linking Words
tool
became smaller and turned drop-shaped, Use synonyms
whereas
it was formerly oval-shaped.
Manufactured 1.4 Linking Words
million
Use synonyms
years
ago, the previous one was blunt and uneven. Use synonyms
However
, when it came 800 thousand Linking Words
years
ago, the edge of Use synonyms
this
Linking Words
tool
was much sharper. Some obvious changes can be witnessed from the Use synonyms
rear view
and the front view, as the Correct your spelling
rearview
tool
was made with smoother surfaces.
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Additionally
, the stone used for cutting 1.4 Linking Words
million
Use synonyms
years
ago seemed to be processed simply, with few sharpening traces. It was relatively thick and rough, compared with the one produced 800 thousand Use synonyms
years
ago. After more than 1.3 Use synonyms
million
Use synonyms
years
, the stony Use synonyms
tool
appeared thinner when viewed from its side.Use synonyms