Sciencespeaking topic
Sleep is a great evolutionary puzzle: for hours you lie defenseless, motionless, open to predators. Why didn't nature erase something this dangerous instead of leaving it to every creature? What sleep provides must be vital enough to be worth the risk of being eaten, but what exactly is it?
— evolution of sleep
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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