The picture as a whole describes the growing dominance of the stones used to cut in the stone age. Through this diagram, the evolution between cutting tools was made 1. 4 million years ago and those in 800 thousand years ago can be observed clearly.
The first stone was used as cutting tools over million years ago. In overall, it was simple because in this stage, ancester of modern human did not have the ability to create a sharp stones. It was also quite big viewing from back view, front view and side view. Therefore, these tools were difficult to hold and cut things.
The second was upgraded. It could be seen as a more complicated stones which provide evidence evolution in human’s awareness. Moreover, it was also smaller and sharper than the first stone so that it was more likely to hold, cut things or even become a weapon.
In short, this diagram provides a comparison of two kind of cutting tools in two period in the stone age and consequently, shows a overall picture about ancester of mordern human’s life and the evolution of them which can be observed through stones tools they used.
The picture as a whole
describes
the growing dominance of the
stones
used
to
cut
in the
stone age
. Through this diagram, the evolution between cutting
tools
was made
1. 4 million years ago and those in 800 thousand years ago can
be observed
clearly
.
The
first
stone
was
used
as cutting
tools
over million years ago. In
overall
, it was simple
because
in this stage,
ancester
of modern human did not have the ability to create a sharp
stones
. It was
also
quite
big
viewing from back view, front view and side view.
Therefore
, these
tools
were difficult to hold and
cut
things.
The second
was upgraded
. It could be
seen
as a more complicated
stones
which provide evidence evolution in human’s awareness.
Moreover
, it was
also
smaller and sharper than the
first
stone
so
that it was more likely to hold,
cut
things or even become a weapon.
In short, this diagram provides a comparison of two kind of cutting
tools
in two period in the
stone age
and
consequently
,
shows
a
overall
picture about
ancester
of
mordern
human’s life and the evolution of them which can
be observed
through
stones
tools
they
used
.