Sciencespeaking topic
How did Hubble's observation that galaxies are receding from us, showing the universe is expanding, change our understanding of cosmology?
— Edwin Hubble, the expansion of the universe and Hubble's law (1929)
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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