Hang Son Doong cave — the name means "Mountain River" — is young compared with ... forests growing within Ho Khanh, a ...

This story appears in the January 2011 issue of National Geographic magazine. “Past the hand of dog, watch out for dinosaurs,” says a voice in the dark. I recognize Jonathan Sims’s clipped ...

Vietnam is known for karst landscapes characterized ... It was in this environment, deep in the caves at the base of a mountain in Na Hang Nature Reserve, that researchers discovered a new species ...