Figure 1: Observed and modelled secular variation. Figure 2: Map of annual difference of the second time derivative of the vertical component for epoch 2003.5. High-resolution core magnetic-field ...

You've done crunches and situps and V-Ups for your abs before. But how often do you twist with them, and how often do you use them to stabilize your entire torso? For many, that's the forgotten part ...

Some metals are in liquid form, the prime example being mercury. But there are also enormous quantities of liquid metal in the Earth's core, where temperatures are so high that part of the iron is ...

Yes, you can do situps, and leg lifts and crunches and planks to train your abs. But your core muscles are meant for far more complex movement than those ideas too. And if you're looking for a way to ...