Mariana Trench

 Mariana Trench 

Mariana trench is situated in  the western pacific ocean, approximately 200 km. east of the Mariana island. It is the deepest trench on earth, length 2,550 km, width 69 km. and it is 10,984 mt. deep. At the bottom the pressure is 1,086 bar, the density of water is being increased by 4.96% and temperature is 1 to 4 degree c. Scientists conducted various researches about the trench like, challenger expedition 1875, by using a long rope to measure the depth. At that time the depth was counted 26,850 feet. after that in the year 1951 challenger 2 mission was organised by using echo sound system. Later on many other expedition was organised, even a computerized mini ship was sent to it but every mission was not fully successful. the mini ship was working fine but suddenly at the bottom it was destroyed by some unknown reason. Some researchers told that it was some giant creature who destroyed the ship and some said it was destroyed by water pressure. There are many controversy about Mariana trench, few scientists has given theory that in the deep down of trench there are some primitive life forces or some giant creatures like meagalodon(giant shark existed 3.6 million years ago) are existing. But the truth is still unknown.