I WONDER - How Big Is The Amazon River?

The Amazon River is the second largest river globally, running through the Amazon rainforest. It comprises a vast network of waterways extending up to 6840 kilometers. The river has over 1100 tributaries, with 17 exceeding 1500 kilometers in length. This is more than twice the size of the Grand Canyon. A tributary is defined as a stream flowing into a main river.

How does the size of the Amazon River compare to the Grand Canyon?

What is a tributary?