The sea pig, Scotoplanes globosa — a deep-sea sea cucumber

Via Echinoblog: http://echinoblog.blogspot.com/2009/07/because-you-demanded-it-sea-pig-aka.html

Images 1 and 2: Via WikipediaLink 1; link 2. Lindberg, 1882, Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 : under the command of Captain George S. Nares, R.N., F.R.S. and Captain Frank Turle Thomson, R.N. (public domain)

image 3: (the shiny pink one — source)

Image 4: (the sinister-looking one — source)

Image 5: (the other pink one — source)

Image 6: (the toy — source)

Apparently it’s even been made into a toy by Agatsuma! Available on ebay.

Glider trails (Conway’s Game of Life)

Image 1: A 3D-printed version based on this thing that you can download and print! (image by Berend) 

Image 2: Source: http://en.wikipedia.org/wiki/Glider_(Conway’s_Life)

Caption: “A three-dimensional view of a glider, with previous generations visible going down the z-axis. The c/4 period is clearly visible as “stacks” of cells that remain alive for successive generations.” (cc-by-sa)