New studies show that the most found type of the plant first came from the Amazon basin.

"Did you get over the mountains and into the Amazon basin at all?"

The most obvious differences are between the groups found north or south of the Amazon basin.

It is not found anywhere in the Amazon basin, however.

We know how much it rains over the Amazon basin.

And it's the same story in many other rivers throughout the Amazon basin.

To explore the Amazon basin, the team split into three group.

The city is still an important trading port in the Amazon basin.

This is the first record of young, migratory fish in the Amazon basin.

He made three trips to the Amazon basin, each lasting several years.