Sciencespeaking topic
The eyes of fish living in a cave vanished completely over generations; nature took back the organ they didn't use. If we don't use what we have, do we really lose it?
— regressive evolution / cave fish
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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