"On Earth, usually, these veins are formed by water circulation in fractures, and this usually occurs in low to moderate temperatures, " said ChemCam team member Nicolas Mangold of the Laboratoire de Planetologie et Geodynamique de Nantes, France.

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Sure, people are likely contributing somewhat to the moderate warming that has occurred in recent decades, but temperatures are still cooler than they have been for most of the past 10, 000 years and we are a long way from a global warming crisis.

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