That’s a great write up, thanks. Haven’t heard about the connection between the Amazon rainforest and African diatoms, that’s fascinating.
I thought lake Chad started to dry up mostly in the 60s. I went to read some more about that and I just can’t not mention that the original lake is apparently called Mega-Chad :)
Anyway, in case anyone else is interested to read about ancient microorganisms fuelling Amazon’s growth, here’s a really interesting paper that describes this system in great detail.