The picture depicts cutting tools utilized by the early human and how it transformed in two separate times: 1. 4 million years ago and 80000 years ago.
Overall, it can be clearly seen that cutting tools underwent significant changes over the period in terms of their form although their sizes are relatively the same. Specifically, tool B turned more sophisticated than tool A with regard to shape and sharpness.
In 1. 4 million years ago, the cutting tool was a jagged piece of rock with no identifiable shape and 10 cm in length. Moreover, looking from side and back views show the stone tool was thick and had rough surface and blunt edges.
80000 years ago, this tool has a much more refinement than before. In the front and rear side, it is obvious that tool B had become bigger and resembled a tear-drop shape with a broad base and tappering toward a sharp tip, although there had been no change in the length. Additionally, its surface was more evenly and smoothly than tool A, which dated back to 1. 4 million years ago. From the side view, the prior cutting tool has evolved to become more flattened and thin, giving the tool a sharper edge on the sides as well
The picture depicts
cutting
tools
utilized by the early human and how it transformed in two separate times: 1. 4 million years ago and 80000 years ago.
Overall
, it can be
clearly
seen
that
cutting
tools
underwent significant
changes
over the period in terms of their form although their sizes are
relatively
the same.
Specifically
,
tool
B turned more sophisticated than
tool
A with regard to shape and sharpness.
In 1. 4 million years ago, the
cutting
tool
was a jagged piece of rock with no identifiable shape and 10 cm in length.
Moreover
, looking from side and back views
show
the stone
tool
was thick and had rough surface and blunt edges.
80000 years ago, this
tool
has a much more refinement than
before
. In the front and rear side, it is obvious that
tool
B had become bigger and resembled a tear-drop shape with a broad base and
tappering
toward a sharp tip, although there had been no
change
in the length.
Additionally
, its surface was more
evenly
and
smoothly
than
tool
A, which dated back to 1. 4 million years ago. From the side view, the prior
cutting
tool
has evolved to become more flattened and thin, giving the
tool
a sharper edge on the
sides
as
well