The greatest unsolved mystery in the world

Hello friends today we are now going to discuss on the greatest unsolved mystery in the world.

We are always knows now day science were develop and everyday new discovery held.

Anytime discovery of new element and anytime discovery of new planets and discovery of new machines, gadgets, tools etc...

But today we are now going to discuss on the greatest unsolved mystery in the world. So let’s explore.

1. The Underground Mystery:

If I ask to you what was inside the earth surface you says coal, petrol and other minerals but this minerals in only found in short depth.

I ask what was inside the long depth in earth.

So A scientist think this question and try to solved this mystery He dig a long hole in earth surface and after the time period of 26 years digging was completed and only for 12Km deep hole dig by the human.

This hole you see in this image The name of this hole is Kola super deep Borehole This is largest hole in the human history no any hole dig by human which is long this hole. This hole is found in Russia.

But you have question in your mind why this hole stopped in only 12KM why we do not dig more in this hole.

The one of the answer is in the depth of earth have high temperature in the depth of 12 km there have high temperature in this temperature no any machine can work and If any machine do work it melts.

This hole is known as the Deepest Artificial point of earth.

But if we study in school teacher always ask in the depth of earth have many layer like crust, inner , outer.

But every time held new discover and in the discover of 2014 It says in the depth of earth have large amount of water exist and there have life form because there have water there have life.

But this is theory no any theory exactly be correct so we don’t know what was inside the surface of earth.

2. Unexplored Cave:

We are always know in the earth have large sea and we always know human cannot discovered 95% part of ocean only 5% part of world water explored.

So like this in earth many of cave exist and large amount of cave doesn’t explored in earth in a discover scientist say in the earth only have 5% of cave were explored and 90% of cave were unexplored.