[arcadeparade]

given that the Sahara is only a couple thousand years old does that mean the amazon is just as young?

[macintux]

An interesting article on how people shaped the Amazon.

https://www.theatlantic.com/science/archive/2017/03/its-now-...

[thaumasiotes]

The Amazon is much younger; much of what is jungle today wasn't before the Columbian Exchange.

There is a theory that American reforestation was responsible for the Little Ice Age.

[pinkfoot]

Very good question.