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"Are the dried up river valleys seen on Mars, likely to be Millions, or Billions of years old?"
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How Life Shatters Chemistry's Mirror
Handedness, or “chirality,” is when molecules come in two forms that are mirror images of each other, like right- and left-handed gloves. Even though chiral molecules are produced equally in nature, life seems to prefer one hand over the other. The reason for this is a mystery that scientists are struggling to answer.
Source: [Astrobiology Magazine]
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