Looking into it further, the team determined that the Amazon river really did flow in the opposite direction in the past.

Does the Amazon River Flow Backward ... Although most major rivers on Earth flow in a single direction from their source to ...

the Amazon River flowed towards the Pacific Ocean, in the opposite direction it flows today. Where the Amazon River's mouth sits today, there was once a highland that allowed for this westerly flow.

Hamza says the thermal information allowed his team of researchers to identify the movement of water under the Amazon River The flow of the underground river which follows a similar contour to the ...