The gooey interior of Io (and why it likely isn't a "magma ocean")

One of the more exciting frontiers in geology is that of planetary volcanology - that is, how do volcanoes work on other planets. We know at least a few in our solar system have volcanism in one form or another - silicate magma, sulfur magma, liquid water - and both active and extinct volcanoes. So, it should be no surprise that any new findings on the volcanic activity on other planets would be newsworthy … but sometimes that news just doesn't match the actual science involved.