Per 
Item #: SCP-XXXX
Object Class: Euclid
Special Containment Procedures: SCP-XXXX is to be kept in a Grade I Medical Quarantine Containment Cell, equipped with a dual-chamber oxygen-replenishment system with expired oxygen being burned in the Foundation’s crematoriums. SCP-XXXX is to be supplied with consumer-grade “space food” from the Foundation’s gift shop twice a day, with “space ice-cream” being supplied once a week on Thursdays at 1847.
SCP-XXXX is to be observed at all times, as its ability to shapeshift at least once has been observed, albeit outside of the Foundation by dubious firsthand reports.
Description: SCP-XXXX is a humanoid male resembling Russian-████ astronaut Cmdr. ███ ████████. SCP-XXXX does not show up on any MRI, CAT, or X-ray scan, nor does it appear to weigh anything when convinced to step onto a scale. Tests involving a tub of water suggest that SCP-XXXX has no volume, as the level of the water in the tub did not rise or fall with SCP-XXXX’s ingress or egress. Attempts to draw blood from SCP-XXXX result in air filling the syringe, suggesting that SCP-XXXX is empty beneath the skin. No attempts to surgically inspect SCP-XXXX have been made, as all attempts to induce unconsciousness in SCP-XXXX have failed, and SCP-XXXX exhibits expressions of fear when presented with surgical equipment.
SCP-XXXX has not shown any signs of speech or ability to emit sound, and attempts to probe the inside of SCP-XXXX’s mouth have resulted in SCP-XXXX eating the probe. Attempts by researchers to probe SCP-XXXX’s ears have resulted in the inspecting researcher later reporting a permanent 37% hearing loss in the ear on their dominant side. No attempts have been made to probe SCP-XXXX’s anus or urethra.
Psych analyses of researchers who came into direct contact with SCP-XXXX reported that the researchers, already well-versed in physics and astronomy, checked out numerous middle-school level textbooks on those subjects from the Foundation’s child education library and read them front to back.
Addendum: SCP-XXXX was first admitted to the Foundation approximately two (2) months after Cmdr. ███████ returned from his fourth mission to the moon, and his first mission beneath the moon’s surface. ███████ began exhibiting signs of fever and headache shortly after his return to earth, and was promptly hospitalized.
Sometime during the night, ███████ felt the urge to vomit, and moved to the bathroom. After dry heaving for approximately two minutes, ███████ reported a feeling of “my entire fucking body, from the top of my head to the edge of my toes, being forced up my throat and out of my mouth.” SCP-XXXX exited ███████’s mouth and “twisted and turned” until it was a “goddamn doppelganger” of ███████' s appearance, including his hospital gown and slippers. While ███████ was sitting on the bathroom floor, SCP-XXXX walked from the bathroom to ███████’s bed and placed itself in it, appearing to fall asleep.
Addendum: After a suggestion by Dr. █████, a poster of the moon was placed in SCP-XXXX’s chamber. SCP-XXXX’s then stared at the poster for over one hundred and ten (110) hours, as reported by each shift of staff, until it was removed. Researchers on shift during its removal reported a “sad” expression on SCP-XXXX for four (4) hours after the removal of the post.
Addendum: The playback of Johan Strauss’ “The Blue Danube” in SCP-XXXX’s chambers resulted in SCP-XXXX exhibiting a smile, which turned into motions and facial expressions that resembled laughter, though no sound was recorded by the chamber microphones. An interview with Cmdr ███████ revealed that the 1968 movie 2001: A Space Odyssey was his childhood inspiration for becoming an astronaut. Playback of other classical pieces featured in the movie has failed to elicit the same reaction from SCP-XXXX.
