Signs of acid fog found on Mars.

Mars has acid fog which eats away rocks and is caused by volcanic eruptions on the red planet, a new study suggests. A planetary scientist has pieced together a compelling story about how acidic vapors may have eaten at the rocks in a 100-acre area on Husband Hill in the Columbia Hills of Gusev Crater on Shoshanna Cole. An assistant professor at Ithaca College in New York, used a variety of data gathered by multiple instruments on the 2003 Mars Exploration Rover Spirit to tease out informatio...
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Scientists reveal birth date of earth’s inner core.

A reassessment of ancient rocks has led scientists to estimate that Earth's inner core started to form earlier than was previously thought, around 1.3 billion years ago. As it started to freeze, the core began generating a bigger magnetic field, which continues to today. Earth's active core contrasts sharply with that of our neighbor Mars, whose strong early magnetic field died around four billion years ago. Our planet's magnetic field is generated deep in the planet by the turbulent motion o...
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