Scientists using data from Europe's Mars Express probe have discovered glassy particles spread over a huge area of the northern hemisphere of the Red Planet. Glass is formed in such conditions-- similar to the case of Iceland-- when sand, volcanism, and water interact. The glass on Mars is the first direct evidence for explosive volcanism on Mars.
It could also point us to possible habitats for life on Mars. The hydrothermic vents that produced the glass that was thrown across the northern lowlands would combine energy, potential food, and water-- a solid habitat for life, and therefore, an excellent place to search early on.
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