Due to its vast size — stretching from Canada and Greenland in the north, to Mexico in the south — North America contains a ...

There are many unique species of fish living in the Colorado River. Some include the bonytail chub, razorback sucker, and ...

The Rio Grande is one of the longest and most ecologically diverse river systems in North America. Here are some of the ...

North America, with its variety of climates and landscapes, is home to some pretty amazing and incredible animals. From the Arctic of Greenland and Canada, the grasslands, deserts, forests, and ...

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 ...