Opinion: Mars is suddenly more interesting

NASA's Curiosity rover has discovered organic compounds -- molecules containing carbon and hydrogen, along with other elements -- on Mars, and this is good news in the search for life. Organic molecules are the stuff of life: they are the building blocks of the living cell and at the center of all its processes. Life on Earth synthesizes organic compounds from water and carbon dioxide, using the power of the sun or tapping energy from hydrothermal vents at the floor of the ocean to build these molecules.

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