Sciencespeaking topic
When wolves returned to a region, the courses of rivers changed. By frightening the deer the wolves let the trees grow back and the banks grew firm. How does a single predator redraw an entire landscape?
— trophic cascade / Yellowstone wolves
practice with this topic
Set the timer (5-30 min), take 20 seconds of prep if you like, start talking. Jot your thoughts onto the sticky-note board.
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