Are subterranean lifeforms viable on Mars? A new interpretation of Martian seismic data by scientists Ikuo Katayama of Hiroshima University and Yuya Akamatsu of Research Institute for Marine Geodynamics suggests the presence of water below the surface of Mars. “If liquid water exists on Mars,” Katayama says, “the presence of microbial activity” is possible.

These laboratory experiments back up Katayama and Yuya’s hypothesis that the boundary measured by seismic data indicates a transition from dry rock to wet rock rather than a change in porosity or chemical composition. The findings, therefore, provide compelling evidence for the existence of liquid water beneath the surface of Mars. “Many studies suggest the presence of water on ancient Mars billions of years ago,” Katayama explains, “but our model indicates the presence of liquid water on present-day Mars.”