These attributes decrease linearly at a rate of ~1.14% per day until 
the object reaches a minimum apparent diameter of .5cm, minimum 
base speed of 4kph, and a minimum apparent luminescence of 
~25,000cd. If it remains in this state for more than 24.2 days, it will 
cease to be influenced by the direct observation criteria until a 
minimum of three Delta events have occurred - this is classified as a 
Kappa event. 


Through current containment procedures the object is maintained at 
a diameter of .5cm - 1cm and apparent luminosity of ~25,000cd - 
~200,000cd. No upper limits to size, speed, or luminosity have yet 
been observed. Highest observed (2cm diameter, 327kph, 
~1,650,000cd) occurred during Event 1350-27 in 1957. 


+ Recovery Log SCP-1350 
Recovery Log SCP-1350 


SCP-1350 was discovered on 06-02-1952 by Foundation 
Research Team -58, enroute to study SCP- . The 
object was first observed at 9:42pm, described in audio 
logs as "a kind of star moving toward us". The team 
consisted of 8 members, 6 of whom encountered Delta 
events within the first 5 minutes of contact. Agent 

and Dr. _ , who had been setting up a communication 
beacon, observed this encounter from a significant 
distance away and retreated immediately to call for 
backup. They maintained evasion for 15 hours before 
being overtaken, providing most of the initial intelligence 
about the object. 


Mobile Task Force Alpha-8, "Ice Breakers", was 
dispatched to determine the nature of the object and to 
establish preliminary containment procedures. Contact 


with the object was established 06-04-1952, resulting in 
the immediate loss of 2 task force members, and the 
progressive loss of another 10 members over the course 
of the following 2 months. 


Further properties of the object were determined during 
this time, after which plans began to be drawn up for 
Containment Area-52. Object delivered with no further 
casualties to the Containment Area on 09-29-1952. 


No connection has been established between SCP-1350 
and SCP-_, and the object's original proximity to SCP- 
has been judged to be coincidental. 


+ Event Log 1350-27 
Event Log 1350-27: 


Initial containment procedures consisted of the primary 
dome and two additional buildings with D-class being 
instructed to face the object and turn away in alternating 
intervals. Construction of four D-class domes and 
Containment Track Alpha took place during this time. 
This was originally deemed to be sufficient for 
containment, given a proper supply of D-class. 


On 05-09-1953 this construction was completed, and 
official containment procedures began. 


On 02-16-1959 a D-class unexpectedly died of a heart 
attack during containment procedures, resulting ina 
Delta event. Maintenance prevented the timely 
movement of remaining D-class to Containment Track 
Alpha, resulting in the loss of all D-class in the 
containment area. SCP-1350 then approached the 
primary dome, resulting in a Delta Outbreak event and 
the loss of fourteen additional personnel and D-class. 


Secondary dome personnel took over and led the object 
on acircular route for a period of 22 days, with the loss 
of four additional personnel. Emergency personnel 


arrived to repair the primary site and revise containment 
procedures. Immediate construction began on the 
secondary ring of domes, and containment was 
transferred to them on a temporary basis. Containment 
Track Alpha was prepared, and the object was 
transferred there on 06-29-1959. Eight additional domes 
and tracks were added to the primary ring, completed 
02-11-1962, after which current containment procedures 
were initiated. 


Addendum 1350-01: 


The object's origins are unknown, but it is highly probable that Team 

-58 was the first group of living creatures it had encountered since 
its appearance, [DATA EXPUNGED] At this velocity containment 
would be impossible. Subsequent contact with all life exceeding 
2488 grams is currently estimated [O5 CLEARANCE ONLY, SEE 
DOCUMENT 1350-Kk] 


Investigation into the object's possible original path to the location of 
its discovery has thus far been fruitless. However, [DATA 
EXPUNGED] Observatories are to be directed not to observe this 
phenomena. 


Events 1350-14 and 1350-79 have proven the dangers of attempting 
to test the object's parameters. Further experimentation on 
SCP-1350 is forbidden. 


SCP-1350 must be prevented from coming within 200km of the 
ocean at all costs. 


Footnotes 

1. acombination stimulant, thought suppressant, and attention 
enhancer, designed to ensure the Class-D currently targeted will 
immediately focus upon SCP-1350 

2. defined as a 30m radius around the currently targeted D-class 
dome 

3. the object has variable acceleration, but has not been observed to 
accelerate faster than .05m/s? 


« SCP-1349 | SCP-1350 | SCP-1351 » 


SCP-1351: Moebius Cave 


Item #: SCP-1351 
Object Class: Euclid 


Special Containment Procedures: SCP-1351 is contained onsite 
under the cover of a bat sanctuary with a standard perimeter fence 
and signs warning away unauthorized personnel. The permanent 
security team is to be covered as United States National Park 
Rangers and/or civilian speleologists. The access road to the 
entrance of SCP-1351 is to be marked “Authorized Vehicles Only” to 
match nearby park roads which are not open to the general public. 


Personnel within SCP-1351 are to follow standard subterranean 
safety protocols. 


¢ All personnel must operate in groups no fewer than four, with 
each personnel equipped with at least three sources of light 
(one of which must not be dependent on batteries). In the 
event of a team member in distress, at least one individual 
must remain with the distressed individual, while at least two 
individuals must return to get help. 
Personnel must verbally inform at least two individuals 
(typically the site security watch officer and the on-duty 
research supervisor) of their intended destination within 
SCP-1351 and their intended return time, in addition to 
documenting their intentions in writing. 
Personnel must also carry sufficient food, water, and first aid 
equipment for twice their intended stay within SCP-1351. 
« Any individual who becomes lost or separated should remain 
where they are and wait to be found. 


The current Director of the United States National Park Service and 
the current Mammoth Cave National Park Superintendent are to be 
informed of the importance of maintaining containment; further 
information related to either SCP-1351 or the Foundation is to be 


disseminated to these individuals only in accordance with need-to- 
know and written authorization of O5 Command. 


Due to the outbreak of SCP- -EX1, commonly referred to as “White- 
Nose Syndrome” (WNS), any persons entering SCP-1351 must 
submit to biological decontamination. No clothing, shoes, or 
personal effects which have entered other caves since 2006 are 
permitted to enter SCP-1351 to prevent the spread of fungal spores 
believed to be associated with SCP- -EX. Prior to entering and 
after exiting SCP-1351, all persons must walk across nylon bio- 
security mats saturated in a cleaning solution. For consistency, it is 
recommended the bio-security mats and the associated solution 
match those used by the Park (presently Lysol™ IC Quaternary 
Disinfectant Cleaner). This is in accordance with publically released 
SCP- -EX containment protocols designated “National WNS 
Decontamination Protocol 03.15.2012”. 


Description: SCP-1351 is a cave located within Mammoth Cave 
National Park in the American state of Kentucky. The main section 
of cave is approximately 30 kilometers long. No direct connections 
between SCP-1351 and Mammoth Cave have yet been discovered, 
though the possibility remains. Like most caves in the area, 
SCP-1351 appears to have been carved from Mississippian-aged 
limestone strata capped by sandstone; this has resulted in relatively 
few flowstone deposits. 


SCP-1351 is anomalous for three reasons: 


First, it is accessible through a dome in the ceiling of an otherwise 
unremarkable section of cavern 125 meters underground (see Fig. 
3), but this dome's height (~750 meters) would require SCP-1351 to 
be well above surface level. In spite of the inconsistency, SCP-1351 
seems to be subterranean; Foundation speleologists have not yet 
determined a satisfactory explanation for this phenomenon. 


Second, the interior of the cave only has a single surface (the floor) 
and a single boundary component (a wall). Over the course of the 
cavern's several kilometers in length, the floor "wraps around" to 
become the ceiling while one wall "wraps around" to become the 
other. In this it resembles a Moebius strip. Local gravity orients 
towards the nearest floor; a dark band in the rock wall shows the 


location of the boundary between the local gravitational fields. The 
cause of this unusual spatial-warping is not understood at this time. 


Third, temporal anomalies have been observed in relation to 
SCP-1351, though no modern Foundation personnel are known to 
have experienced any such effects. For more details, see Addenda 
2 and 3. These show no consistent pattern. 


Addendum 1: Modern History of SCP-1351 

The cavern from which SCP-1351 is accessible opened to the 
surface when a landslide in 1993 uncovered a natural entrance. 
SCP-1351 was most recently discovered in 1995 by National Park 
Service speleologists mapping the cavern to determine if it 
connected to the main cave system in the park. These scientists 
were subsequently seconded to the Foundation after a standard 
background check and non-disclosure agreement. Three Expedition 
Teams (01, 02, and 03) surveyed the interior of SCP-1351 between 
1995 and 2002, determining the cavern to be sufficiently safe for a 
permanent research presence. Research operations are now 
ongoing. 


Addendum 2: Expedition 1351-1925 

On 23 April 2009, a team of six men and two women, under the 
command of Major Mortimer S. Cornelius III, emerged from 
SCP-1351. (See Fig. 4) They were detained by Foundation security 
personnel. Interviews established that they were a team of explorers 
dispatched by the Foundation in August 1925, and had only spent 
eighteen hours within the cave from their perspective. Their clothing 
and equipment was accurate for the time period, and they 
possessed apparently bona fide documents supporting their 
assertions. However, as there is no record of any of the members of 
the expedition nor of the expedition itself, and since SCP-1351 was 
not known to have been discovered until 1995, they are being 
detained indefinitely. For further information, contact Supervisory 
Special Agent Thomas at Site 19. 


Addendum 3: Discovery of Expedition 1351-2030's Remains 
On 10 June 2011, Foundation researchers discovered the remains 
of four adult humans in a pit in Section 07A of SCP-1351. These 
remains had been mummified and preserved by the calcium nitrate 
present in the cavern; carbon dating indicated the remains to be in 


excess of seven thousand years old. One of the bodies had two 
broken legs, while another had a broken left arm. There was no 
obvious cause of death for any of the subjects. 


¢ Subject 1: Male, 198 cm tall, black hair, facial bone structure 
suggests Caucasian ancestry. Antemortem compound 
fractures in both left and right tibiae. Foundation-issue dog 
tags identify as Dr. Nicholas Lusk, serial number 
[REDACTED]. 

Subject 2: Male, 186 cm tall, red hair, facial bone structure 
suggests Caucasian ancestry. Antemortem simple fracture in 
the left ulna. Foundation-issue dog tags identify as Dr. Lionel 
Dunbar, serial number [REDACTED]. 

Subject 3: Female, 160 cm tall, black hair, facial bone 
structure suggests Japanese ancestry. No apparent injuries. 
Foundation-issue dog tags identify as Dr. Asuka Miyamoto, 
serial number [REDACTED]. 

Subject 4: Female, estimated approximately 164 cm tall. 
Head absent; incision located above C4 vertebra and 
occurred postmortem. No identification located in vicinity of 
body. 


The bodies were clothed in uniform synthetic spelunking coveralls 
and equipped with gear estimated to be roughly equivalent to the 
level of technology expected to exist by the mid-2030s. Among the 
gear was a damaged camcorder with predictably dead batteries. 
Efforts to power the camcorder and recover the information 
documented have [DATA EXPUNGED]. 


Footnotes 

1.SCP- -EX is adisease affecting numerous species of North 
American bats which has been confirmed in nineteen American 
states and four Canadian provinces. Ongoing studies both by 
Foundation and non-affiliated organizations have accumulated 
increasing evidence that suggests it is caused by the 
fungusGeomyces destructans. The disease itself is not well 
understood by either the Foundation or non-affiliated scientists; 
research continues. At present, there is no known treatment for 
afflicted bats, nor is there a known containment protocol capable of 
preventing transmission. The mortality rate varies by species, but 


has been observed as being as high as 95%. SCP-  -EX 
hasnotbeen confirmed to be present in SCP-1351; the related 
containment procedures are intended to prevent it from entering 
SCP-1351. 


« SCP-1350 | SCP-1351 | SCP-1352 » 


SCP-1352: Sentient Whirlwind 


Item #: SCP-1352 
Object Class: Euclid 


Special Containment Procedures: SCP-1352's enclosure is 
located in an isolated valley in Nevada, and is equipped with storm 
shelters. The entity is permitted to wander around the premises of 
the enclosure under the supervision of at least one security guard. 
The enclosure is 5 km2, and the perimeter fencing must be rooted 
10m into the ground to prevent dislodging. Debris must be made 
available within the enclosure for the entity to interact with. 
Personnel entering the enclosure must acquire authorization from 
the Site Director. Proper protective equipment must be worn by 
personnel within the enclosure at all times. Should the entity attempt 
to leave the enclosure, guards or personnel are to use verbal 
commands to prevent it from breaching containment. 


Description: SCP-1352 is a sentient dust devil! with a behavior 
similar to those of domesticated pet-animals. Anemometer readings 
indicate wind speeds of at least 60 km/h, but they shift with the 
mood of the entity. 


SCP-1352 has a preference for interacting with humans, and carries 
small debris with it for this purpose. After interacting with people, the 
funnel will shrink to three meters in height and the entity will attempt 
to surround the person/s as a sign of happiness. If excited, wind 
speeds and funnel size rapidly shift between the 60 and 100 km/h 
parameters. In an angered state, the funnel grows to proportions 
similar to those of F5 tornadoes. The entity will then attack with 
debris thrown at speeds excess of 300 km/h. If SCP-1352 is not 
capable of interacting with people, it will either coerce people into 
interaction through various methods or entertain itself. 


SCP-1352 has displayed signs of intelligent behavior. It has the 
ability to manipulate the wind it generates to pick up and place items 


weighing up to 500 kg with precision (this also affects the funnel 
size). The entity has also been shown to respond to verbal 
commands. The researchers have discovered that it understands 
words such as "stay", "go", "come here", and "fetch", allowing easier 
containment methods. Testing of SCP-1352 has continued, and 
currently the entity can perform more complex tasks such as 
arranging objects into specific patterns such as shapes, and solving 
simple problems e.g., matching objects. 


Addendum: Debriefing with Agent _— after capture of SCP-1352 


Interviewed: Agent 

Interviewer: Dr. 

<Begin Log> 

Dr. _: Please recall how you captured SCP-1352.