In that case, one slab of the planet's rocky crust slides beneath another, where it eventually melts and is recycled. (sciencenewsforstudents.org)
But scientists now believe that, deep beneath almost 1.2 miles (2 kilometers) of ice and a relatively thin slice of rocky crust, one region of the frozen continent hides a column of red - hot magma, straining toward the surface, according to a new study. (scientificamerican.com)
GJ 1132b, as it is known, looks a bit like home: only 16 % bigger in diameter than Earth and about the same density, suggesting a similar rocky crust and iron core. (sciencemag.org)