SCP-173 is meant to be made of concrete, but what's strange is that it creates blood and feces. How would something like that generate blood and feces?

I know it can move when not looked at, so does it have some sort of pocket dimension and can't teleport when looked at?

SCP-173, an extremely tall concrete creature in the corner of a cell with its body facing the wall and the head tilted towards the viewer, a red arrow points at the brown/red stained floor

  • 2
    what exactly is it that you are asking?
    – King_llama
    Oct 24, 2016 at 18:44
  • Related - scifi.stackexchange.com/questions/43509/…
    – Paulie_D
    Oct 24, 2016 at 18:47
  • I've edited your question to make it more clear what you're actually asking (as well as providing a link to those of us who can't remember every SCP off-hand). Feel free to make further edits to clarify, or undo what I've done if you think I went too far Oct 24, 2016 at 18:47
  • 4
    I am guessing the question is ultimately "Why can't crowd-sourced scenarios be internally consistent?" or alternately "Why am I asking this here instead of on a scp-wiki.net forum?"
    – infixed
    Oct 24, 2016 at 18:51
  • A wizard did it.
    – Adamant
    Oct 24, 2016 at 19:09

1 Answer 1


It clearly states in the description that

The reddish brown substance on the floor is a combination of feces and blood. Origin of these materials is unknown.

So there you go. It's unknown.

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