51.   The probe was designed to examine the Martian atmosphere to study how it reacts to solar winds and measure the rate at which oxygen escapes into space.

52.   The spacecraft apparently flew too close to the Martian atmosphere and broke apart or burned up, the space agency said.

53.   The spacecraft could skip by Mars or descend too fast through the Martian atmosphere and burn up.

54.   Though the dust devils lack great violence, they help keep the Martian atmosphere filled with the red dust that absorbs sunlight and helps to energize the major storms.

55.   Using hydrogen brought from Earth and carbon dioxide from the Martian atmosphere, it would be possible to make and store methane, he said.

56.   Mars Surveyor Lander will carry Russian scientific instruments which will measure dust and vapours present in the Martian atmosphere.

57.   The device will measure dust and vapor present in the martian atmosphere.