A biologist might go a lifetime without discovering a new species. It took a team exploring Cambodia's limestone karst a ...

Reporter Larry Pynn stands atop a charred old-growth stump within a karst limestone landscape ravaged by clearcut logging and wildfire on northern Vancouver Island. Photo by Paul Griffiths / for PNG ...

What is karst? Karst is actually the name of a rocky limestone region in Slovenia, but is used as a generic term to describe this type of landscape wherever it occurs throughout the globe ...