|Born||27 November 1904
|Died||26 September 1994 (89) 
Daniel Samuel Christiansen (November 27, 1904 - September 26, 1994) was a Danish-born American carpenter, held to be the author of technical illustrations and documents detailing a religiously-inspired UFO belief, including blueprints for what has been colourfully labelled by devotees as the "Alien Puma Space Train" (APST), which were first published online in late 2013.
- Halperin, David (21 November 2013), The "Box of Crazy," UFOs, and Ezekiel's Vision, davidhalperin.net, http://www.davidhalperin.net/the-box-of-crazy-ufos-and-ezekiels-vision-part-1/
- Investigators of Daniel Christiansen's Mystery Box, reddit.com/r/alienpumaspacetrain, https://www.reddit.com/r/alienpumaspacetrain/
"Box of Crazy" Images
- TramStopDan (3 November 2013), The Box of Crazy, imgur.com/a/uCSg1, https://imgur.com/a/uCSg1
- TramStopDan (5 November 2013), The Box of Crazy (Part 2), imgur.com/a/Ic0IM, https://imgur.com/a/Ic0IM
- TramStopDan (5 November 2013), Master Blueprint for APST, flickr.com, https://www.flickr.com/photos/95422743@N00/10699395664/sizes/o/in/photostream/
- "Florida Death Index, 1877-1998," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VV6G-3NB : 25 December 2014), Daniel Christiansen, 26 Sep 1994; from "Florida Death Index, 1877-1998," index, Ancestry (www.ancestry.com : 2004); citing vol. , certificate number 114847, Florida Department of Health, Office of Vital Records, Jacksonville.