Martian Atmosphere
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Mars atmosphere safe from solar wind despite absence of magnetic dipole: Study
•Present-day Mars is a cold and dry planet with less than one per of Earth's atmospheric pressure at the surface. However many geological features indicate the planet had an active hydrological cycle about 3-4 billion years ago.
Heavy rainfall reshaped Mars' surface long ago: Study
Ians •The fourth planet from the sun, Mars has geological features like the Earth and moon, such as craters and valleys
Nasa's Maven spacecraft reveals that Mars has metal in its atmosphere
Ians •The metal comes from a constant rain of tiny meteoroids onto the Red Planet. When a high-speed meteoroid hits the Martian atmosphere, it vaporises.