The first stone which we manipulated in Mars probe curiosity of the NASA with a pyramid and the size of an American football has proved to be more unusual than scientist previously thought.

The Curiosity used its robotic arm to touch the rock for the first time two weeks ago. Also shot dozens of times with a laser beam.

The results surprised scientists, who on Thursday said that it is not like other rocks seen on Mars. It has more sodium and potassium.

The scientist Edward Stolper said that the rock seems to be more rare volcanic rocks that have been seen on Earth in places like Hawaii. He said that these rocks, which once contained water, are formed at great depths and with a high pressure.