The quest to prove life existed on Mars is a fierce debate in the scientific arena.  Researchers think a certain compound may indicate that there were indeed some form of life there.

NASA’s Mars Curiosity mission is exploring such a spot right now at its landing site around Gale Crater, where the rover has found extensive evidence of past water and is gathering information on methane in the atmosphere, a possible signature of microbial activity.

Let’s find out more about this mysterious substance on page 2

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