Nature documentaries are supposed to wow with their visuals, but they don’t typically lead to actual scientific breakthroughs. But a film team working on a tiger docu for the BBC and German pubcaster ARD have made a groundbreaking discovery high in the Himalayas.

The filmmakers and tiger experts leading the expedition in the South Asian kingdom of Bhutan located a population of tigers living at an altitude of 4,000 meters (13,123 feet) — much higher than ever before seen.

This isn’t the first time the filmmakers were in on a discovery — they also uncovered a new species of giant rat living on the slopes of a remote volcano in the jungles of Papua New Guinea when filming “Lost Land of the Volcano,” which aired this year on ARD.

Produced by Studio Hamburg, NDR Naturfilm and the BBC Natural History Unit, “Lost Land of the Tiger” airs this month on BBC One and next year on ARD. The series marks the fifth nature skein produced by the team.