Dodging Sulfuric "Snottites" Deep Inside of Caves - Robbie Shone

Dodging dangling "snottites" is a hazard that sounds as if it would be reserved for doctors and elementary school teachers. But photographer Robbie Shone says that it is also a hazard of exploring deep inside some of Mexico's most extensive cave systems. The danger of these dangling, mucus-like collection of microbes is that they produce sulfuric acid, so Shone explains that they're definitely worth avoiding. Shone explains what it's like deep in these caves, where he has to wear a gas-mask just to take photos.