Frustrating article to read. I think the answer to "why" is implied here: > This extraordinary ability is a direct consequence of their isolated island home, w

Frustrating article to read. I think the answer to "why" is implied here: > This extraordinary ability is a direct consequence of their isolated island home, where there are only limited freshwater sources. The real answer is: they drink salt water because fresh water is scarce; it's their only option.