Solar Wind turned Mars into a dry, cold planet

Particles blasting out from the sun stripped away what was once a thick, Earth-like atmosphere on Mars, leaving behind a dry and cold world inhospitable to life.
About 4 billion years ago when life was starting on Earth, Mars also had a dense atmosphere which kept the planet warm and wet. Measurements by one of NASA’s Mars-orbiting spacecraft show that over time, energized particles in the solar wind stripped off Mars’ atmosphere, leaving thin and still-shrinking envelope of gases around the planet. [video type='youtube' id='mFIYGSZOt4k' height='365'] Courtesy: REUTERS
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