"hey Christy... Call me crazy but... What if the giant creatures we saw... Came from this lab?... Like... What if the people here experimented on animals for some reason?..."
The idea certainly seemed feasible. Genetic modification in typical, known earth species to make something entirely new...like giant mice and rats the size of houses...She shivered as they walked past the various tanks, filled with a sickening, semi-transparent liquid which seemed to be cultivating tiny beings. She reached out to touch the closest glass surface, as if to affirm to herself whether or not it was real. It was cool to touch - and definitely real. She recoiled, shuddering.
As they reached the end of the corridor, encountering a large greenhouse, they stumbled across plants. Large, multi-coloured ones that didn't seemed to identify with any known species (at least that she knew) on their earth. The problem, she supposed, was that it was no longer their earth.
"I studied engineering, pal," she said, slowly, refusing to budge her eyes from the weird and wonderful flora and fauna "About as far from biology as you can get. But as an engineer, I can conclude that these do not look natural. Just look at the symmetry. A typical signature of an engineer and in this case, I think we're dealing with a genetic engineer."