This heatmap anination shows the concentration of known deep-sea dives with visual observations in the North Atlantic.

What is NATO? NATO stands for the North Atlantic Treaty Organization. It is a "political and military alliance" between the 31 countries listed, and now, Sweden is joining that list.

The first map shows the land 510 million years ago, progressing from there—reading left to right, top to bottom—through the accretion and dissolution of Pangaea into the most recent Ice Age ...