A ranch. Somewhere high in north-western Montana. We’re fly fishing in the baking heat, casting for trout, listening to the trickle of clear spring creeks and glimpsing sleek, fast-moving shapes in the shadows.

It should be relaxing, but I’m distracted. I discovered in a chance conversation with the rancher’s wife earlier in the morning that at least two dinosaurs are entombed in rock on their land and she promised a ride to where the university volunteers are digging – and spending the long scorching summer.

“Yeah, they’re all living up there in the rocks, right beside the rattlers,” said the woman with a  real life Jurassic Park on her land. “Someone flew over the ranch in a hang glider years ago and discovered the site and they’ve been working on it on and off ever since.”

The Jeep bounced, rattled and shuddered its way over a track more suited to cowboys…