00:01
Hello students, here the question is about the stone tools.
00:03
So while the earliest known stone tools are dated to around 3 .3 million years ago and it is possible that our extreme relatives used tools even earlier than these.
00:11
So however older tools may not have been preserved in the fossil record for several reasons.
00:16
For example, organic materials such as wood or bone tend to decompose quickly.
00:20
So organic materials decompose quickly and also geological processes that create fossils such as sedimentation and mineralization may not have been present or active in certain environments where early tools were used.
00:49
Geological processes may be absent.
01:05
Regarding the comparison of three tools from my own life, there are three tools that is smartphone, pen, and fork.
01:16
We can use that.
01:18
First is smartphone.
01:27
That smartphone tool is used for communication, accessing information, entertainment, and various other purpose and it contains many different components including a touch screen, battery, processor, camera, and various sensors.
01:40
Next is pen...