Planetary scientists continue to puzzle over the mysterious slope streaks on Mars. What's causing them?

Wednesday, January 23, 2019 - 10:31 in Astronomy & Space

Since they were first observed in the 1970s by the Viking missions, the slope streaks that periodically appear along slopes on Mars have continued to intrigue scientists. After years of study, scientists still aren't sure exactly what causes them. While some believe that "wet" mechanisms are the culprit, others think they are the result of "dry" mechanisms.

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