The only iguanas outside the Americas, Fiji iguanas are an enigma. A new genetic analysis shows that they are most closely related to the North American desert iguana, having separated about 34 million years ago,

A new study suggests Fiji's iguanas came from North America around 34 million years ago by floating some 5,000 miles. It's the longest-known dispersal of any land animal. So how did they do it?