Upwards and Downwards
- Episode aired 1994
Aristotle and Madame Curie demonstrate the force of gravity, but they soon need the force of cleaning up as well.Aristotle and Madame Curie demonstrate the force of gravity, but they soon need the force of cleaning up as well.Aristotle and Madame Curie demonstrate the force of gravity, but they soon need the force of cleaning up as well.