[forester]

He said the Amazon people moved huge amounts of dirt to build roads and plazas. At one place, there is evidence that they even built a bridge spanning a major river. The people also altered the natural forest, planting and maintaining orchards and agricultural fields and the effects of this stewardship can still be seen today, Heckenberger said.

How about that...prehistoric amazon engineers!

[Carry_Okie]

Shocks the hell out of me.

[Dark Wing]

You will find this of interest.