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Continue to ChatGalileo's Undone Gravity Experiment: Part 1 https://kirstenhacker.wordpress.com/2020/02/29/galileos-undone-gravity-experiment-part-1/
Galileo's Undone Gravity Experiment: Part 1 https://kirstenhacker.wordpress.com/2020/02/29/galileos-undone-gravity-experiment-part-1/