Is there air on Mars ?

 Mars
Mars,  or Red Planet, is one of the twelve planets of the solar system. Its  fourth order is far from the Sun, the first near the Earth, an unknown  rocky planet with a size of 6.318 × 1011 km3, and its gravity is 3.711 m  / It is about 6800 km in diameter, equal to the Earth's radius, and is the second smallest planet after the planet Mercury. Mars is estimated to be about a quarter of the Earth's surface. It orbits the Sun at about 228 million kilometers, about 1.5 kilometers from the distance between Earth's orbit and the sun 

Scientists, astronauts and astronauts have discovered traces of the  remains of water bodies and streams of frozen rivers. They also found on  its surface one of the largest mountains known to date, Mount Olympus  Mons,
Which  is three times higher than Mount Everest, has steep slopes that look  closer to the shape of ancient volcanic eruptions and may be evidence of  volcanoes still alive. Mars  was named after the word "red", meaning "red". The Romans set it as a  god of war and a symbol of power. They named it Mars, while astronomers,  astronauts, and specialists In the study of the geometry of the universe called the red planet,  because of the high proportion of iron oxide dust on the surface, and in  Goh also

 Life on Mars
Scientists  believe that Mars was a planet that was full of life because of its  estimate of about 3.8 billion years ago, which makes the possibility of  life on its surface very likely, especially since it has the  characteristics of being a living planet, Very  similar to the terrain, and a range of long-distance valleys, also has  the largest volcano in the solar system, called Olympus Munz, which was  named after this name Mount Olymp. The  maximum temperature of Mars is twenty-seven degrees Celsius, and the  minimum hundred and thirty-three degrees Celsius below zero, so it is a  very cold climate, compared to Mercury and Venus, and the atmosphere  consists of several gases, notably: carbon dioxide, nitrogen, Argon, water vapor, and other gases.
The fact of the existence of air in Mars
Scientists  have agreed that the density of air on the surface of Mars is not equal  to the density of air on the surface of the planet, the rate of  atmospheric pressure on the surface of Mars about 0.75%, the rate of  atmospheric pressure on the ground, which explains why the US space  agency to encapsulate the sensors that Sending it to Mars a huge air-ball, to absorb the shock when it arrives, and its impact on the surface of Mars. Scientists  and experts conclusively confirm that Mars also contains air, but can  not breathe; it contains a high percentage of toxic carbon dioxide,  which is estimated at 95.32 percent, nitrogen gas by 2.7 percent, and  gas Argon is estimated at 1.6%, while the oxygen content is very low, not exceeding 0.13%. 

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