Uploaded October 2022 | Updated September 2026, 2 weeks ago

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Why does a mirror reverse right and left, but not up and down? It’s a question that crops up perennially in the letters and queries columns of magazines and newspapers. And it was the inspiration for Lewis Carroll's Alice Through the Looking Glass.

My other YouTube channels:
The Science Fiction Rock Experience ( the music show I produce):
youtube.com/@ScienceFictionRockExperience
Discover Maths (with Juan Medina):
youtube.com/@discovermaths
Science World (with Emrah Polat):
youtube.com/@ScienceWorld1

My website: daviddarling.info