Donald Trump isn't the first US president to offer to buy Greenland, but he might be the most determined
The tug of war between Denmark and America over Greenland is about much more than Donald Trump’s trademark bluster. It is ...
Putting seismic waves through their paces with machine learning
Earthquakes excite the Earth’s subsurface over a small area, and waves of energy then propagate through the solid earth. Depending on the depth of the waves and the materials they encounter, they can ...