The series premiered on demand on November 23, 2015, and on Syfy on December 14, 2015. A 13-episode second season premiered on February 1, 2017. In March 2017, Syfy renewed The Expanse for a 13-episode third season to air in 2018.
Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian.
Expanded perlite is also used in the chemical, petroleum-refining, food, and pharmaceutical industries and in glassmaking and agriculture. Perlite is widely used in many countries throughout the world. The USSR has aggregate geological reserves of perlite that are estimated at approximately 500 million m 3.