Have we got plate tectonics wrong? A new view of seafloor spreading at slower-spreading mid-ocean ridges.

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Journey to the deepest oceans on the latest oceanographic research ships with Cardiff University's Prof Chris MacLeod, as he and fellow marine geologists question the textbook view of the fundamentals of plate tectonics: how new ocean crust is created by seafloor spreading at mid-ocean ridges. These underwater chains of volcanoes pave two-thirds of the planet yet are less well surveyed than the surface of Pluto. Learn how hard-won discoveries from the latest scientific expeditions at Earth's final frontier are leading to a new, very different view of seafloor spreading.