the Earth's lithosphere. Due primarily to damage, SCP-2510 is 
nonfunctional and its original purpose remains unknown. Reverse 
engineering has been applied to isolated portions of SCP-2510 with 
several positive results.2 Interior is composed mostly of a jet black 
material discovered to be cubic boron nitride with a wurtzite crystal 
structure. Tubes and wires are visible between the metal plating, 
exhibiting a dim, green light. 95% of SCP-2510's interior is flooded 
or too damaged to be directly accessed. 


SCP-2510-1 is a circular trans-dimensional gateway crafted from re- 
purposed SCP-2510 parts. The inner-ring contains a flower-like 
pattern with the symmetrical structure of a hexagon.3 The outer-ring 
is engraved with the symbols A (Alpha), B (Beta), [ (Gamma), A 
(Delta), and E (Epsilon) in a clockwise direction. SCP-2510-1 unfurls 
when activated, becoming a doorway to one of several possible 
environments. SCP-2510-1 draws energy from a still unreachable 
power source within SCP-2510. SCP-2510-1 is operated via 
SCP-2510-2. 


SCP-2510-2 is a hydraulis+ constructed directly across from 
SCP-2510-1. Like SCP-2510-1, it is not believed to be an original 
part of SCP-2510. Engraved on its base is a tetrad, a triangular 
figure consisting of ten points arranged in four rows: one, two, three, 
and four points in each row, which is the geometrical representation 
of the fourth triangular number. The tetrad was a symbol sacred to 
Pythagoreans, each row denoting the Harmony of the Spheres.® It 
has been assumed that the tetractys coincide with the Pythagorean 
music system. These rows can be divided into the ratios 4:3, 3:2, 
and 2:1; musically, these ratios correspond with the perfect fourth, 
perfect fifth, and perfect octave - the basic components of the 
Pythagorean scales. 


SCP-2510 was first discovered by Breton-French navigator Yves- 
Joseph de Kerguelen-Trémarec on 12 February 1772, claiming the 
island for the French crown. The Foundation became alerted to the 
true nature of SCP-2510 on 20 August 1949 after the discovery of a 
military report in Occupied West Germany, detailing an incident 
involving the German auxiliary cruiser Atlantis in late December, 
1940. The ship docked at SCP-2510 while the crew performed 
maintenance and replenished their water supplies. While harvesting 


ice the crew struck something with the appearance of artificial 
construction. Assumed at first to be an ancient shipwreck, the sailors 
attempted excavation with apparent hopes for "treasure". Nineteen 
would return to the Atlantis delirious and suffering from acute 
radiation poisoning; survivors, upon recovery, would report having 
found a "maschinenstadt" (machine city). 


The Foundation, with permission of the French government, 
established a presence in the Kerguelen Islands. After extensive 
research, the entire Kerguelen Plateau would be classified as 
SCP-2510. Construction of Armed Dimensional Containment Site-08 
was completed by 20 October 1951. 


For further documentation with regards to Armed Dimensional 
Containment Site-08, contact Site Director. 


Mobile Task Force Alpha-5 "Paranaughts" was created to explore 
SCP-2510-1 once its anomalous properties had been established. 


Mobile Task Force Alpha-5 "Paranaughts" Roster: 


Captain William Hadley - Commanding Officer 

Doctor Albert Cronenberg - Zoologist/geneticist/microbiologist 
Doctor Joseph Maxwell - Engineer/mathematician 

Doctor Judith Low - Archaeologist/historian/anthropologist 
Doctor Jacob Armitage - Astrophysicist 

Doctor Laura Baker - Geologist/geographer 


Capt. Hadley, Dr. Maxwell, and Dr. Armitage were veterans of the 
Second World War; due to their significant military training and 
experience, they were equipped with simple sidearms as a 
precautionary measure. 


+ SCP-2510-1-Alpha Activation 


On 15 November 1952, SCP-2510-1-Alpha was 
activated by the perfect fourth (4:3). "A" symbol on the 
outer-ring displayed a violet glow while the inner-ring 
aperture unfolds to reveal an opaque void, large enough 
to enter. Mobile Task Force Alpha-5 "Paranaughts", an 
MTFA trained and equipped for trans-dimensional 


exploration, were tasked with an expedition into 
SCP-2510-1-Alpha. Equipment designed for the supply 
of breathable oxygen and elimination of carbon dioxide, 
maintain stable internal pressure, and protect against 
hazardous material and inhospitable environments. Suits 
are tethered to both life support systems and radio 
cables, limiting mobility. 


SCP-2510-1-Alpha Exploration Log: 


Cpt. Hadley: How do you read, Site 
Command? 


Site Command: We read you loud and clear. 
What do you see? 


Cpt. Hadley: Lungs didn't explode. [chuckles] 
We're on land. Dusty, gray - totally barren. Not 
much to see. Not a sign of life. Stars are 
visible though. 


Site Command: Armitage. Provide an 
astronomical report. Anything of note? 


Dr. Armitage: Roger. It was one of the first 
things | noticed. Only thing that seemed in 
place. 


Site Command: Explain. 


Dr. Armitage: Astronomical alignment 
coincides with Earth. I'd say we are 
somewhere near the equator but | can't verify 
this without more data. 


Site Command: Understood. Photograph 
everything, no matter how mundane. Captain? 


Cpt. Hadley: We hear you. 


Site Command: You've all got about 12 
meters of slack. Keep this in mind when 


exploring. Baker? Get a read on the land. 
Bring back a few samples. 


Dr. Baker: Copy that. 


Site Command: Low? Cronenberg? How are 
you two holding up? 


Dr. Low: Fine. Although I'm not exactly sure 
why | am here. 


Dr. Cronenberg: Wunderbar. Einfach 
wunderbar. 


Site Command: We're walking blind here. 
Could have been little green men on the other 
side for all we knew. Low? Keep an eye for 
anything artificial. Cronenberg? No fucking 
sass. Doesn't sound like there is much life 
here so keep an eye on the life support. 
Maxwell? Work with Cronenberg. You've got 
an hour. Make it worth your while. 


Post-Operation Report: 


First I'd like to speak freely: Our first portal 
jump was a success, albeit rather anti-climatic 
looking back on the transcript. 


Relatively successful data recovery. Soil 
sample, according to Baker, was shown to be 
devoid of nutrients. Cronenberg confirmed a 
complete lack of life. If this was Earth, none of 
us can say what exactly happened to it. 
Whatever happened, not even bacteria 
survived. XK-Class scenario - a doomsday 
conclusion without explanation. We've got the 
corpse but not the murder weapon. 

-Captain William Hadley 


+ SCP-2510-1-Beta Activation 


On 29 November 1952, SCP-2510-1-Beta was activated 
by the perfect unison (1:1). "B" symbol on the outer-ring 
displays a violet glow while the inner-ring aperture 
opens. Mobile Task Force Alpha-5 "Paranaughts" enter 
the aperture with equipment and procedure identical to 
that of the previous expedition. A live video transmission 
was deemed acceptable, manned and operated by Dr. 
Maxwell. 


SCP-2510-1-Beta Exploration Log: 


Cpt. Hadley: How do you read, Site 
Command? 


Site Command: We read you loud and clear. 

Receiving video feed. Significant interference. 
Your eyes will still have the best viewing. We'll 
try to clean up the video later. 


Cpt. Hadley: Copy that. Area looks to be 
artificially constructed. Superficial resemblance 
with a subway tunnel. Honestly? | think we 
exited from a washroom. Bloody disgusting in 
there. Saw a few humans, tend to ignore us 
and keep to the shadows. Look pretty sick 
from the few real glimpses I've had. 


Site Command: We've received readings. Air 
seems polluted but breathable. Pressure looks 
to be normal. Temperature might be a bit chilly 
but tolerable. Alter life support to air filtration 
and feel free to remove the heavier equipment. 
Keep two attached and equipped. Maxwell and 
Armitage? Hold the portal. The rest of you get 
properly mobile and see what you can find. 


Several minutes of silence. 


Cpt. Hadley: We're ready. We'll rendezvous 
here in two hours. Maxwell will keep you 
updated. We'll then compile our reports. 


been proven to be equally effective in treating SCP-281 test 
subjects. 


Addendum 281-A-01: Recovery and preliminary containment notes 


On / /20 aremote monitoring station picked up encrypted 
transmissions emanating from a location in the Mountains. 
After decryption, the transmissions were found to be reporting 
progress on a project referred to as ‘Full Circle’ and SCP-281 was 
secured by a Foundation airborne recovery team during a raid ona 
fortified hiker's cabin. The device's creator, a 36-year-old African 
American male identified post-mortem as : , exhibited 
erratic and aggressive behavior when encountered. No evidence 
exists of an affiliation with any known GOI or other organization. 


Footnotes 

1. This effect is similar in nature to the WonderZoom feature 
ofSCP-2445. While no link between the creation of these objects is 
believed to exist, examination of this documentation provides further 
insight into the nature of paratechnological temporal distortions. 


« SCP-280 | SCP-281 | SCP-282 » 


Site Command: Copy that. Godspeed. 
Maxwell? Keep filming. Still trying to find any 
discrepancies. Look for any writing; billboards, 
graffiti, and so on. 


Dr. Maxwell: Copy that. No billboards, far as | 
can see, but plenty of writing. I'd call it graffiti 
but it just coincides with the architecture too 
well. See what | mean? 


Video focuses on a nearby wall, appears 
covered in scratches. 


Site Command: Can't make sense of it on our 
side. What do you think you see? 


Dr. Maxwell: Looks Greek. We'll get some 
proper photos made. Have Low check it out 
post-operation. A lot of spiral symbols. Most 
common icon displays three curves emanating 
from a central point. Looks a bit sloppy but | 
see the exact same motif all over the place. 
Guessing that is how it is meant to look. 


Site Command: Any tech? 


Dr. Maxwell: You know, that is the strangest 
part. | thought we were in an underground 
station but no rail tracks. Surface of the floor 
and walls are red brick and cement but has a 
glossy reflection. Like everything is moist and 
slimy. Then again, not much different from the 
London Underground. [chuckles] Hold. We've 
got vibrations. Locals are gathering at the 
edge of the platform. Holy shit... [static] 


Site Command: Losing you. What do you 
see? 


Dr. Maxwell: Probably should have kept 
Cronenberg with us. 


| see an object. Hold on, there seem to be 
entities. [15 seconds of silence] Looks like 
we're not alone, Command. I'm attempting to 
hide, but this suit is making it difficult. Are you 
receiving this? 


Camera focuses on a large, fleshy entity 
covered in gaping pores. 


Looks a bit like a grub. Big as a... well... train? 
| think it might actually be some form of 
transportation. Pale white, countless legs - like 
an insect? Yeah. Black chitin in contrast with a 
soft, flabby body. Quite sure it's alive. Think | 
heard it chatter and hiss. 


Native denizens, dressed in cowled robes, 
walk barefoot in and out of the holes. Large 
entity crawls into the tunnels. 


And there it crawls off. In a blink and it's gone. 
Some people came out of it, covered in slime. 
A few have gathered around us. 


Site Command: Are you safe? Do they seem 
hostile? 


Dr. Maxwell: I'd almost call them curious but 
their eyes are blank; almost dead - like they're 
in a trance. Skin fairly jaundiced, can see that 
now. Just staring at us. 


Site Command: Attempt communication. 


Dr. Maxwell: Greetings... Do you understand 
me? 


Camera set on the gathered crowd, focusing 
on the face of one individual; entity opens its 
mouth, displaying more than sixty needle-like 
teeth, its jaw appearing to unhinge; entity 


proceeds to vocalize a screech registered at 
>150 dB; all entities fall into a quadrupedal gait 
and scatter into the darkness 


Site Command: Maxwell! Do you read me? 
Report! 


Dr. Maxwell: Yeah. Jesus Christ. They looked 
human. Still think they are. They're gone now. 
Think it covered our equipment in saliva. 


Site Command: We'll gather a sample upon 
return then get you all cleaned up. Hold your 
ground. Get out as soon as the team regroups. 


Dr. Maxwell: Copy that. 
Post-Operation Report: 


Felt like we were being watched the entire 
time, even when we were certain no one else 
was around. We reached the surface, 
discovered a city hive teeming with life. There 
were black banners, adorned with a yellow 
symbol - almost looked like a spiral of some 
kind. Low said it felt familiar but couldn't recall 
where she saw it before. 


We avoided direct contact with the natives. It 
was something about their unblinking staring - 
like they had a few missing cogs in their head. 
Didn't want to catch whatever sick they had 
either. Most of the buildings were cement and 
featureless. Cronenberg said the DNA sample 
from the spit was "mostly human". The tallest 
structures appeared to be shaped from one 
seamless organic material, spires reaching up 
into a hazy sky so can't say just how tall they 
were. 


Low translated some of the words on the walls. 


Sounded like religious gibberish to me. 


We did have one incident on our way back. 
Baker got scratched by a native. Tore right 
through her suit and left a nasty gash. Wound 
is infected and last | hear, she's running up a 
high fever. Don't think she'll be joining us on 
the next expedition. Armitage and Maxwell lost 
some hearing but are good to go. 

- Captain William Hadley 


+ SCP-2510-1-Gamma Activation 


On 6 December 1952, SCP-2510-1-Gamma was 
activated by the perfect fifth (3:2). "[" symbol on outer- 
ring displays a violet glow while the inner-ring aperture 
opens. Mobile Task Force Alpha-5 "Paranaughts" 
entered the aperture minus Dr. Baker, still in critical 
condition. 


SCP-2510-1-Gamma Exploration Log: 


Cpt. Hadley: How do you read, Site 
Command? 


Site Command: We read you loud and clear. 
Receiving video feed. Interference worse than 
before. 


Cpt. Hadley: Copy that. Reporting a heavy, 
yellow fog. Hard to see anything. See shapes 
in the haze. Think we might be in a forest. 


Site Command: Acknowledged. Please 
continue exploration. 


Cpt. Hadley: Roger. You all heard command. 
Follow me - don't trip on your own wires. 


Dr. Cronenberg: Achtung. These are not 
trees. Do you not see? Focus camera. 


Cpt. Hadley: Cronenberg? What are you 
thinking? 


Dr. Cronenberg: Gnarled like roots, yes? But 
soft to touch. 


Camera focuses on the object in question; 
while as thick and tall as a tree (although, 
atmospheric vapor prevents accurate measure 
of its height) it does not appear to be flora; 
camera moves to reveal the silhouette of 
similar organisms in the distance. 


Dr. Armitage: Disgusting. Looks like sinewy 
intestines. 


Dr. Cronenberg: Mine thoughts exactly. But 
where does it attach? 


Site Command: We are getting some noise 
on your side. Do you hear anything? 


Cpt. Hadley: Affirmative. Like a heartbeat. No, 
heartbeats. Hundreds pulsating at different 
speeds and intervals. 


Dr. Low: The ground is rumbling. An 
earthquake? 


The organic tendril pulls from the ground, 
revealing a chitinous proboscis with several 
wiggling "tongues" before retreating skyward. 


Cpt. Hadley: Oh my God. 


Dr. Maxwell: The hole. It's... it's like a gaping 
wound. I'm not even sure if this is soil beneath 
our feet. 


A mass of squirming organic material erupts 
from the crevice, proceeding to slither/shamble 
towards the team. 


Site Command: Retreat! That is an order! 
Cpt. Hadley: Pull out! Pull out! 


The organism(s) hurls a bone-like projectile at 
the camera; video feed is lost. 


Post-Operation Report: