But it wasn’t an expedition of paleontologists who found it.

It was a pipeline worker.

A man was using a backhoe to move some earth for a pipeline that was being installed near Spirit River, Alberta. The worker hit something he thought was a rock.

He laid the piece of “rock” to one side, and kept digging, according to CBC News.

But it wasn’t rock at all. It was a huge fossilized skeleton—a tail, to be precise.

It was about two metres long.

The worker stopped digging and called in some experts.

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