Across
- 1. A place where water never rests
- 5. Where did Zu Chongzhi publish how he determined the length of a tropical year?
- 6. This person determined π to 4 decimal places in 263 AD
- 7. Also known as ‘Seven Sisters’ or M45
Down
- 2. Gunpowder was invented by accident, in the process of finding an elixir for …
- 3. The new artificial intelligence model created in China
- 4. What was used before compasses to point in the right direction