Lachimax's Sandbox
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SCP-3123-2 during its appearance at the University of Tübingen, Germany, 200█.


An embedding diagram of an Einstein-Rosen bridge, of which SCP-3123 is believed to be a variant.


A sketch of an SCP-3123-2-S specimen, confiscated from a zoologically-inclined member of █████████, Peru (see Selected Incursion Reports, attached).

Item #: SCP-3123

Object Class: Keter

Special Containment Procedures: SCP-3123-1 is to be kept in the center of a chamber with a length and width no less than 60 meters and a height of at least 30 meters (it is currently contained at Site-96, in a room with dimensions 120 x 68 x 45 meters). This room is to be sealed at all times and positive pressure to be maintained in adjacent rooms.

Secondary products of SCP-3123-1 are to be tranquilized on emergence, to be studied on-site by the Paleobiology Division. Due to the varied, and often unknown, biochemistry of these products, tranquilization is not always possible - in these cases, immediate termination is to be carried out. A range of weaponry up to and including heavy artillery is to be maintained on-site, along with personnel trained in its use. Any cadavers are then to be remanded to the Paleobiology Division. The products are not to be approached or handled by personnel without sealed biohazard suits, and must themselves be placed in sealed containers for transport. Any breach of this protocol causing personnel to come into direct contact with one of the specimens is to be corrected by the incineration of the personnel in question, thus mitigating any risk of a breakout of prehistoric disease.
Products of SCP-3123-2 are to be treated similarly, but, as they are more likely to pose a hazard to the public, greater discrimination is permitted in termination and incineration.

Due to its roaming nature, SCP-3123-2 cannot be fully contained until procedures for anchoring it can be developed. Research into such methods is to be a top priority. A Mobile Task Force, MTF Gamma-3123 ('The Rex Wranglers'), is to be dedicated to locating 3123-2 at all times - this procedure is to be carried out with utmost urgency at each appearance, and containment is to follow swiftly.

Excursions, manned or otherwise, through either anomaly are to be ceased until it can be determined what, if any, effect they may have on our present timeline. This applies only to instances leading to the past - when either anomaly opens to a future, excursions are freely permitted.1

Any human exploration of either anomaly is to be preceded by unmanned probes to check for hazardous conditions. Teams crossing an anomaly must wear completely sealed containment suits, and any human returning through an anomaly is to be decontaminated thoroughly and quarantined for at least a week. Any violation of these procedures resulting in possible exposure to unknown contaminants is to result in the incineration of the subject.

Addendum 20██/07/23: Following the events described in Interview 3123-1-X-h and Transcript 3123-1-Xa-2 (attached), exploration of linked futures is non-optional. Any information on SCP-3123-3 is to be gathered at all costs. The fossil record is to be studied for evidence of its activities. Contact is to be established with any post- or pre-human civilizations encountered, to be warned of SCP-3123-3 and/or entreated for any knowledge they may have of it.

Description: SCP-3123 is a spatiotemporal anomaly, a bridge across time and space. SCP-3123-1 appears to be the primary portal, maintaining a continuous worldline - that is to say, it is constant. Meanwhile, SCP-3123-2 jumps around geographically, disappearing and reappearing in a new place at regular intervals (although both appear to be locked to near the surface of the Earth).

The two are identical in appearance, but not behavior. They bend light in their vicinity in a manner consistent with the hypothesized Einstein-Rosen bridge. They are invisible but for this effect, which gives them the appearance of spherical 'lenses'. However, unlike an E-R bridge, neither portal will admit light or any other form of electromagnetic radiation into the 'throat' of the bridge. Because of this, excursion teams must remain tethered to this side by optic-fiber cables to facilitate communication.

Solid objects can pass freely through the portals in either direction - however, liquids and gases appear unable to enter either anomaly unless contained within a solid. Living organisms may pass through SCP-3123 unharmed. Animals will usually not enter the anomaly voluntarily - it is, after all, a foreign object. However, whether through curiosity or accident, incursion incidents occur with enough regularity that pre- or post-historic animals can pose a serious threat to the public, as demonstrated Selected Incident Reports, attached.

Each new instance of SCP-3123-2 leads to a different point in SCP-3123-1's timeline; a person entering an instance of SCP-3123-2 will exit SCP-3123-1 at a different point in time, and vice versa. This can be any point after the Earth's formation, with recorded instances from approximately four billion years in the past through to the deep future. The destination of SCP-3123-1 shifts regularly to a random point in time. This occurs with the same periodicity as SCP-3123-2's appearances and disappearances, with a shift occurring every █ weeks. The two cycles match; whenever SCP-3123-2 disappears, both anomalies shift destinations. The size of each anomaly fluctuates between cycles. However, their respective sizes at any given time do not appear to be connected. Away Team observations indicate that connected versions of the anomalies are the same size, as expected.
SCP-3123 destinations appear to follow a roughly Gaussian2 distribution centered on our time, with a secondary peak at the K-T boundary. The reason for this peak is unknown.

Both SCP-3123-1 and 2 are responsive to magnetic fields, allowing them to be relocated - this is how SCP-3123-1 was contained in the first place, and how SCP-3123-2 is transported to more convenient locations when necessary. It appears that SCP-3123-1 has drifted slowly over its billions of years of existence, likely in part thanks to the Earth's magnetic field. However, magnetic fields do not appear to elicit any changes in the physical nature of the anomalies.

SCP-3123-1 is, at this time, firmly under containment; but, due to the complete unpredictability of SCP-3123-2's movements, its containment has always proved vexing. The timing of these movements is predictable, but the location to which SCP-3123-2 will move follows no discernible pattern thus far.
MTF Gamma-3123 is able to track 3123-2 using the gravitational waves produced by its opening (detected by an array of satellites in high orbit) but is not yet able to predict its movements with any degree of precision. For this reason, MTF Gamma-3123 keeps a fully-fuelled supersonic jet on hand for when the anomaly's position is determined. Ideally, a team would already be there waiting when the portal shifted, but the randomness of the anomaly's movements precludes this.

The second prong of SCP-3123-2 containment efforts is the development of anchoring procedures, to lock it in place and prevent it from moving. The anomaly's responsiveness to magnetic fields may be a promising avenue, but little progress has been made.

Addendum 200█/01/09: Movement is no longer considered random - a breakthrough in predicting the apparitions has been made, and the mathematical model used currently gives the location within a five hundred kilometer margin of error. Further refinements are becoming possible with closer study. The formula seems to be correct, but precise definitions of the constants of proportionality in each term are yet to be found. Each appearance constrains these constants further, and accurate predictive containment is becoming more feasible over time.

History: SCP-3123-2 has been known to the Foundation almost since the organization's inception, but remained mostly uncontained until the technology was developed to detect it's location. SCP-3123-1 was recovered from an isolated plateau in South America in 1912. Several breakthroughs in paleobiology and paleogeology have been made thanks to the anomaly, both from incursions by animals from the other side and by regular excursions through the bridge. Some of these discoveries have been disseminated subtly to the broader scientific community, with valid cover stories as to the source of the insight. Some presumed evolutionary links have been invalidated by studies of mitochondrial DNA, while surprising new ones have been suggested.

In 199█, SCP-3123-2 remained untracked through an entire cycle, despite MTF Gamma-3123's every effort. This coincided with the beginning of Incident-3123-M (See SCP-3123-2-M in Selected Incident Reports, attached). It is now believed that the object was underwater during the missing cycle, which was previously believed to be impossible. Given Earth's geography, the odds are heavily in favor of oceanic appearances, so it remains unknown why the anomaly appears on land some 99% of the time.

Occasionally, instances of either anomaly will bridge to the future. This sometimes results in the emergence of animals from the future. Most information about such incursions has been classified O5-only. However, incursions appear to originate from possible futures, shifting between worldlines with each apparition.

Selected Incursion Reports for SCP-3123

SCP-3123-1-X has been very cooperative and appears eager to understand and be understood by its captors. In fact, it seems quite unfazed by its situation. Interviews are ongoing. As a reward for its cooperation, it was allowed to interact with SCP-3123-1-C 'Birdo'; although 1-C was wary of 1-X at first, the two have become closely bonded.

Interview Log: SCP-3123-1-X

Between interviews, Doctors Hoang and Faraji followed SCP-3123-1-X's instructions, using remote-control robots within a chamber rated for containing thermonuclear explosions. They succeeded in accessing the file and recording the intended footage.

At the conclusion of Interview 3123-1-X-h, Incident 3123-1-zf took place. Several fragments of molten rock emerged through SCP-3123-1 at high velocity, causing severe damage to the chamber and to Site-96. The composition of some of the rocks was later confirmed to precisely match samples obtained from the Chixculub crater - samples of the comet responsible for the Cretaceous-Paleogene extinction event and of its impact crater.

Addendum 20██/07/23: Upon viewing the footage described in Transcript 3123-1-Xa-2, SCP-3123-1-X entered an uncommunicative state and refused to eat for days. Its self-preservation instincts kicked in eventually, but, to date, it rejects any attempts to speak to it. At Dr. Faraji's suggestion, SCP-3123-1-C was used as a therapy animal to treat SCP-3123-1-X. This has resulted in some apparent improvement in mood. SCP-3123-1-X now occasionally speaks, in its own language, to SCP-3123-1-C, but has not communicated to the Foundation since the incident.

Addendum 20██/09/13: The locations of SCP-3123-2's materializations appear to have re-randomized, and are no longer a good fit for the developed mathematical model.
SCP-3123-1-N has been re-designated SCP-3123-3.