Sciencespeaking topic
Mitochondria, the organelles that produce energy for your cells, were once independent bacteria; billions of years ago they slipped inside another cell and stayed. They still carry their own DNA. So with every breath you draw, you are using the legacy of an ancient guest living inside you.
— endosymbiotic theory
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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