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c Mary Gagen

The other geographical love of Dr Mary Gagen's life - the Arctic. "I think I am turning into a giant rainforest fan, although I feel as though I am cheating on the Arctic," she says.

Elephants repeatedly destroyed a replacement metal bridge in the Danum Valley until it was rebuilt in its original wood form!

"You get this smell of the clutch burning inside the drill and know it’s time to take a break." Dr Mary Gagen.

Conditions are hot, humid and tough in Danum Valley, Borneo.

Dr Mary Gagen in the primary rainforest of Danum Valley, Borneo.

Dr Mary Gagen on location. Analysing tree rings provides centuries of climate change data.