Marcela Perea, owner and personal trainer for CrossFit 100 in Glendale, Wi., demonstrates the banded rotation exercise. This is great for core training and stabilization. 5 Questions with LeRoy Butler ...

Different measurements of inner core rotation have delivered inconsistent results. An analysis of seismic data provides a resolution of this discrepancy by suggesting decadal variations in inner core ...

Figure 1: Newly observed doublet and PKP waves. A linear, non-zero fit for all PKPdf time shifts as a function of time lapse would imply a constant rate of inner-core differential rotation with ...