Imagine if Greenland bordered Portugal, Brazil no longer had a coastline, and Tibet suddenly lay by the sea. It sounds ...

The legendary island near Ireland first appears on maps around 1330. Meanwhile, the earliest mention of Brasil Island in the ...

Old maps are rife with phantom islands. Sometimes these nonexistent landmasses come about because of mistakes made by sailors ...

The geology of the ocean floor is truly spectacular — perhaps even more than land geology. Unfortunately, it's really hard to study.