Paths
Curated sequences - cards meant to be read in order.
- Measure the Earth Yourself From a shadow in Alexandria to measuring the planet's radius with map software - the same measurement, 2,250 years apart, and you can do every step. 6 cards
- See It with Your Own Eyes A porch-astronomy course in six cards - each evening's experiment is free, and the last step is a navigation problem you can actually solve. 6 cards