It’s a bit like a science fiction movie: Scientists work feverishly come up with the perfect antidote to kill off the aliens that are attacking the host planet. In the case of the planet known as the Eastern hemlock tree, the alien is the woolly adelgid, and the cure is being developed in the laboratories at North Georgia College & State University. The school’s Predator Beetle Lab will hold an open house Oct. 14 to explain the production process used to breed the beetles in the effort to save the hemlock.