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Rank: Senior Researcher/SR Clearance Level: 3 List of Personnel involved in testing: Myself, MTF [REDACTED], MTF [REDACTED], MTF [REDACTED], MTF [REDACTED], DoS&R [REDACTED], Head of Research Weiss, MTF Nu7 PFC Rainbow LB18, MTF Nu7 JFTO MSGT Kiddo B34N, MTF Nu7 1LT Zero 3530, MTF TAU5 Danny, MTF Stealth Operative [REDACTED], Lead Researcher Illager, & Dev Researcher Emma Bolthmore. Level D personnel involved: N/A SCP: SCP-939 & SCP-966. Errors and/or safety hazards: SCP-966 could've escaped & we would have to terminate him, or 939 could eat one of our MTF's. Question: Can SCP-939 detect 966 when 966 is cloaked? ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SCP-939 Background Research. SCP-939 are endothermic, pack-based predators that display atrophy of various systems similar to troglobitic organisms. The skins of SCP-939 are highly permeable to moisture and translucent red, owing to a compound chemically similar to hemoglobin. SCP-939 average 2.2 meters tall standing upright and weigh an average of 250 kg, though weight is highly variable. Each of their four limbs ends in three-fingered claws with a fourth, opposable digit, and are covered in setae which considerably augment climbing ability. Their heads are elongated, devoid of even vestigial eyes or eye sockets, and contain no brain casing. The jaws of SCP-939 are lined with red, faintly luminescent fang-like teeth, similar to those belonging to specimens of the genus Chauliodus, up to 6 cm in length, and encircled by heat-sensitive pit organs. Eye spots, sensitive to light and dark, run the length of their spined dorsal ridges. These spines may be up to 16 cm long and are believed to be sensitive to changes in air pressure and flow. SCP-939 do not possess many vital organ systems; central and peripheral nervous systems, circulatory system, and digestive tract are all absent. SCP-939's respiratory system is atrophied and serves no apparent purpose beyond spreading AMN-C227 (see below). SCP-939 have no apparent physiological need to feed, nor any way to digest consumed tissue. Ingested material typically accumulates in the respiratory system of SCP-939 and is regurgitated once the amount is sufficient to markedly inhibit its function. Despite the absence of many vital organ systems, SCP-939 is capable of bearing live young. See Addendum 10-16-1991. SCP-939's primary method of luring prey is the imitation of human speech in the voices of prior victims, though imitation of other species and active nocturnal hunts have been documented. SCP-939 vocalizations often imply significant distress; whether SCP-939 understands their vocalizations or are repeating previously heard phrases is the subject of ongoing study. How SCP-939 acquire voices is not currently understood; specimens have been documented imitating victims despite never hearing the victim speak. Analysis of SCP-939 vocalizations cannot distinguish between SCP-939 and samples of known victims' voices. The use of biometric voice-recognition security or identification systems at any installation housing SCP-939 is strongly discouraged for this reason. Prey is usually killed with a single bite to the cranium or neck; bite forces have been measured in excess of 35 MPa. SCP-939 exhale minute traces of an aerosolized Class C amnestic, designated AMN-C227. AMN-C227 causes temporary anterograde amnesia, inhibiting memory formation for the duration of exposure, plus an average of thirty (30) minutes. It is colorless, odorless, and tasteless with an estimated ECt50 for inhalation of 0.0015mg•min/m3. In well-ventilated or open-air environments, the risk of exposure to ECt50 is greatly reduced but not negligible. AMN-C227 is typically undetectable in the bloodstream sixty (60) minutes following cessation of exposure. Reported sensations of disorientation and mild hallucinations immediately following removal from environments saturated with the agent are similar to the recreational use of numerous psychoactive substances and easily mistaken as such. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SCP-966 Background Research. SCP-966 are predatory creatures that resemble hairless, digitigrade humans, possessing an elongated face with a mouth lined with needle-like teeth. On each hand, they have five claws that can be up to 20 cm long. Although sharp, these are easily broken, making them unfit for combat. SCP-966's height ranges from 1.4 to 1.6 meters, and they can reach up to 30 kg in weight. Physically, SCP-966 is weak, possessing hollow bones and low muscular density. They do not seem to rest through sleep; instead, they will suddenly cease all movement at seemingly random intervals of time, resuming normal activity three to five minutes later. SCP-966 is visible only at wavelengths ranging from 700 nm to about 900 nm. This applies to all of SCP-966's tissues. If their skin, muscles or organs have suffered from second to third-degree burns, the affected areas will be visible at wavelengths ranging from 360 to 900 nm. SCP-966 feeds on medium-to-large-sized animals, including humans. They hunt either alone or in pairs. Their hunting methods consist of emitting a single burst of a previously unknown type of wave (dubbed ██████ waves, in honor of the late Doctor ██████), which permanently inhibits the ability of the affected creature to enter any of the NREM and REM sleep stages. The ability to micro-sleep is also lost. The effective range of the ██████ waves is up to 20 meters; however, tests show that they can be blocked by post-transition metals, particularly lead. All attempts to make victims of SCP-966 sleep have failed. It is still possible to induce other forms of unconsciousness, although these will usually prove detrimental to the affected subject as they do not provide true rest. After depriving their victims of sleep, SCP-966 will stalk their prey until the lack of rest incapacitates it. At this point, SCP-966 will proceed to consume it. SCP-966 have proved to be very agile and silent while stalking their victims. On occasion, they will deliberately make threatening noises around the prey in order to further stress it, and may even physically assault it if the victim proves to be particularly durable. Other than the common symptoms caused by sleep deprivation, some victims of SCP-966 have shown signs of suffering from extremely vivid hallucinations, as well as sudden bouts of rage with no apparent external stimuli. It is currently thought that these are the effects of prolonged exposure to ██████ waves. Why SCP-966 continually exposes these waves to only some of their victims is unknown. One hypothesis is that SCP-966 will only do this when starving, since it further degenerates the physical and mental state of their prey, incapacitating it at a faster rate. Wild instances of SCP-966 are found all over the world. Since their discovery in 19██, the Foundation has succeeded in greatly thinning their numbers, though they are still found in large quantities in many countries, particularly █████ and █████ ███████. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Hypothesis: I think 939 will be able to see 966 because of any movement by an entity 939 can sense that entity. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Observation/Visual Stimuli(Photos/videos): All MTF, research, & VIP walking with SCP-966 boxed. Everyone entered SCP-939's room. Spookytech is writing down logs as MTF Stealth Operative got SCP-966 into SCP-939's CC. Everyone waited. As soon Spookytech finished his logs, DoS&R left along with a few MTF. Spookytech told everyone we are starting the test and what the test was about. Spookytech told everyone the test has started and that they should all stay quiet. SCP-939 apparently heard Spookytech talking, along with other researchers and 939 attacked Spookytech, thankfully Spookytech did not get hurt or bitten, but 939 did take the recording camera and chewed that up, and Spookytech was scared and retreated and told everyone that the test was over. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ This test has been canceled because I got scared and that I had to retreat for my life, apparently I had a panic attack and stoped the test, and don't worry, the test will be continued and that I will be doing this test again in the near future. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Analysis and Conclusion: It was unknown what happened, all I know is that I can quickly dodge 939's attack and that I was able to get away, but as I said, this is to be continued. Do your results align with your hypothesis?: [UNKNOWN] Approved by the Director of Research and Security and the Head of Research. For use in Site-05. Secure, Contain, And Protect.