An artificial boundary is a boundary made by humans, examples include dams, the fence at the border between the U.S and Mexico. A natural boundary is a boundary made by nature, a boundary that happens naturally, examples include rivers, mountains and such.
Legends of Chima. Legends of Chima is a CGI animated television series based on the LEGO Legends of Chima series of LEGO sets. It began with 2 episodes airing on January 16, 2013, with the Season 1 finale on December 5, 2013. On March 15, 2014, season 2 premiered on Cartoon Network and ended on November 22, 2014.
Tremors: The Series is a spin-off of Tremors and was produced at the same time as Tremors 4: The Legend Begins. The story for the TV series picks up from where Tremors 3: Back to Perfection leaves off. It follows the residents of Perfection Valley attempting to co-exist with an albino Graboid they call El Blanco, while dealing with problems caused by failed government experiments, mad scientists, and ruthless real-estate developers.