Is he the key to understanding what the universe is really made of and if it will expand forever, remain static or eventually contract? Or is he just a piece of black Swiss cheese? Dark Matter is also part of the Theoreticals 4-Pack and Darkness & Light 2-Pack. No two are exactly the same. This is the heaviest particle in the Zoo.

Approximately 24 oz/700 grams; 5.5 inches/15 cm across.
For ages 5 and up as it contains glued-on/small parts.