The diagram depicts the evolution of ancient
stone cutting
tools made by humans in the early Add a hyphen
stone-cutting
years
from 1.4 Use synonyms
million
to 0.8 Use synonyms
million
Use synonyms
years
ago.
Use synonyms
Overall
, it is notable that the tool B from 0.8 Linking Words
million
Use synonyms
years
ago was larger, thinner, and more well-made than its earlier counterpart.
Approximately 1.4 Use synonyms
million
Use synonyms
years
old, the cutting tool was relatively small, with a length of 7 cm, and the stone surface was rugged from the front and back views, Use synonyms
while
the side view showed an uneven edge.
Linking Words
This
tool saw a significant change 600,000 Linking Words
years
later. Use synonyms
As a result
, the stone blade was about 3 cm longer. The shape was more defined, closely resembling a water droplet, and smoother in appearance from the front and back, to make cutting easier and more convenient. Linking Words
Besides
, the side view presented a sharpened and smooth edge, effectively assisting early humans to cut things holistically and quicklyLinking Words
muscovytomea