Subsistence-farming of Humans ... left today: 20% of its existing forests.
You can fill in the familiar blanks:

(Oh and: while we're categorizing species)--Humans being noted at-root to be seppuku-seeking, over-breeding lemming ilk)
it's taken all this time for "how to kill your planet", in detailed sequence, thus to Notice that we're utterly smug about our manifest Ignorance..

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..But: PBS's Nature and today's Madagaskar provide the material which never gets ink on the $$$Bizness-owned meeja,
though as always: Preaching to the choir :-/

PS: Bones of a giant-Lemur found in what appears to be 7 miles of underground, water filled tunnels, with largest caverns worldwide, yet found.

Then [here, anyway]

Nova
Secret Mind of Slime
56 min

Scientists investigate the bizarre "intelligence" of slime molds, which appear to learn and make decisions -- without a brain. These cunning, single-celled blobs can navigate mazes and create efficient networks.
These cunning, single-celled blobs can navigate mazes and create efficient networks. Can they also redefine cognition?

A clever graphic shows the 'How' they/It? picked the Best of seven food choices

Carrion ..it's often found under, "attention-span history".
(But if cognition itself is up-for-grabs? maybe it's unremarkable that a slime-mold might out-do a gaggle of Muricans.

PPS: Hilarious conclusion: 3 blobs in a walled course: nick-named Australia, Japan, U.S. (for the ways their problem-solving algorithms were altered!) ... RACE---> !!!
No spoiler re the outcome but this alone is worth peeping the hour

Love. It.