September Nature Geoscience cover photo: Stretching of the continental crust can double its surface area, but it is unknown whether similar amounts of extension occur at depth. Seismic results from the central Basin and Range province, western USA, reveal a thick root of lithospheric mantle that has not been extended and indicates that crustal stretching is decoupled from extension at depth. The image shows badlands in Death Valley, California. See “Differential motion between upper crust and lithospheric mantle in the central Basin and Range”, by Schulte-Pelkum et al., p. 619-6326. Photo by Ian Parker.