When the Mars Reconnaissance Orbiter spied vast clay deposits on the surface of Mars, it was a major discovery supporting the possibility that the red planet was once a wet and warm planet. Just about all of the research being done on Mars these days revolves around the wet mars theory and the possibility that it could have supported life in the deep past, but now some doubt has been cast on where those clay deposits came from that could spell the end of science’s hopes for a second genesis.
Just last year, the wet mars theory took its first hit when researchers suggested that the clay deposits didn’t result from large standing bodies of water but from periodic subsurface outflows that carried the clay and minerals to the surface. This already didn’t bode well for the blue Mars that scientists had been hoping for, but now a new theory on the deposits argues that you don’t even need that much water to have clay in the first place. According to Universe Today, a research team led by Alain Meunier of the Université de Poitiers, has found geologic evidence on Earth that suggests the clay was actually formed by solidifying magma instead, meaning that planetary scientists have been looking at the leavings of volcanic activity rather than ancient lakes.