Overview
Why is a small region of China home to an extraordinary number of giant holes containing vast, little explored subterranean forests? One professor is on a dangerous mission to find out.
Details
- Status
- Released
- Release date
- January 1, 2012
- Original language
- English
- Spoken languages
- English
- Production
- National Geographic
- Budget
- Not recorded
- Revenue
- Not recorded
- Homepage
- Official site