Veronica couldn't entirely help herself. The way he lit up when she pointed out the outpost made her grin right back, some of the smugness of her usual smile leached away. "Yes," she said. "No. Not a fence like you're thinking of. An electric fence. It's - I'm not actually entirely sure how it works, something to do with a field of electricity that reacts when the dinosaurs get near it. Whoever was here before all of us got collars on all those things. I try not to question for fear my brain will explode if I think about it too hard."