Is DARK MATTER the key to understanding what the universe is really made of and if it will expand forever, remain static, or eventually contract? Or is it just a piece of black Swiss cheese?
Dark Matter is also part of the Theoreticals 3-Pack and Darkness & Light 2-Pack. No two are exactly the same. This is the heaviest particle in the Zoo.
Approximately 17 oz (481 gm); 5.5 inches (15 cm) across.
For ages 5 and up as it contains glued-on/small parts.