Sciencespeaking topic
A fly can land on a wall and a mountain goat can cling to a cliff, but a human can't hold on. As things get smaller, adhesive forces beat weight. Why is Spider-Man impossible at human size?
— surface forces / scale
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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