Godo evening. I'm a pathologist. Been one for about seventeen years now. I work at a private research facility in northern New Mexico, and I'm calling because I need to tell someone what I've been doing for the last eight months. What we've been working on. In May of last year, we received a specimen. That's what they called it in the documentation. Specimen K-7. It arrived in three separate refrigerated containers, each one requiring two people to move. The paperwork that came with it was minimal. Just a requisition number, a date, and instructions for storage temperature. Negative four degrees Celsius. Very specific about that. I'd been doing this kind of work for over a decade at that point, mostly on contract for various government agencies. Tissue analysis, toxicology, cause of death determinations for classified cases. You sign the papers, you do the work, you don't ask questions. That's how it goes. But when they wheeled those containers into the lab, I knew this was different. The lead supervisor, Dr. Reyes, she had this look on her face. Not worried, exactly. More like she was preparing herself for something.
We opened the first container that afternoon. I was wearing full PPE, which is standard, but they'd also brought in additional ventilation equipment. Overkill for a normal autopsy, but again, I didn't ask. The specimen was humanoid. That's the first thing you need to understand. Two arms, two legs, bilateral symmetry, head and torso. But that's where the similarity ended. The integument, the skin, it wasn't skin at all. It was scaled. Not like fish scales, these were more substantial. Keratinous plates that overlapped in a regular pattern across the entire body surface. Each scale was roughly circular, maybe two centimeters in diameter, with a slight ridge running down the center. The coloration was a deep greenish-grey, darker dorsally, lighter on the ventral surface. Classic countershading pattern you'd see in aquatic reptiles. The specimen measured two hundred and six centimeters from crown to heel. The musculature was dense. When we began the initial external examination, the tissue consistency was remarkable. Even in death, even refrigerated for god knows how long, the muscle fiber had this taut quality. Dr. Reyes made note of it. She said it reminded her of shark tissue, that same compact density. The head was the real thing, though. Elongated cranium, maybe thirty percent longer than a human skull would be. The orbital cavities were massive, forward-facing, suggesting binocular vision. But the eyes themselves, they'd collapsed post-mortem. Just these sunken dark pits. The jaw structure, when we examined it, showed a full set of what I can only describe as teeth. Conical, slightly recurved. Forty-eight of them in total. Perfect for gripping, not for grinding.
We started the internal examination on day three. Standard Y-incision, but the instruments we normally use weren't adequate. The scale layer was tough, almost chitinous. We had to use surgical shears designed for cutting through bone. Even then, it took two of us. The subcutaneous layer was thin. Almost no adipose tissue. What we found underneath was fascinating from an anatomical perspective. The musculature was arranged in a pattern I'd never seen. Instead of the layered structure you'd expect in a human, these were more like interlocking bands. Very efficient for certain types of movement. Probably gave incredible tensile strength. Then we opened the thoracic cavity. I've performed maybe four hundred autopsies in my career. I thought I'd seen everything. But this was something else entirely. The heart, if you can call it that, had three chambers. Not four like a mammal, not two like a fish. Three distinct chambers arranged in a triangular configuration. Each chamber had its own set of valves. The tissue was dense, dark red, almost purple. When we sectioned it, the ventricular walls were incredibly thick. Maybe three times what you'd see in a human heart of comparable size. Dr. Reyes theorized it was built for high-pressure circulation, maybe for an environment with different atmospheric conditions than Earth. The lungs were even stranger. Two of them, yes, but the internal structure was wrong. Instead of the branching alveolar pattern you'd expect, these had what looked like a series of parallel tubes. Like a bird's parabronchial lung system, but more complex. Each tube was lined with this membrane that was remarkably intact despite the specimen's condition. Under microscopy, we could see it was only a few cells thick. Designed for maximum gas exchange efficiency.
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