Five years after I caved with them in Papua New Guinea, British cavers Andy Eavis, Tony White, Sid Perou and other friends were part of the Mulu 80 expedition that pushed an underground river in Sarawak, Malaysia to discover the world's largest underground chamber. Now there's a new film on their discovery by Emmy Award winning cameraman Gavin Newman. Here's a cool preview: https://www.youtube.com/watch?v=HrZkKPPZhEA
