“Deutronium is a flammable substance resembling white pebbles with many uses. ("The Girl from the...Deutronium
“Cosmonium is a precious substance which could be found in Preplanis' crust. The miner Nerim...Cosmonium
“Colonization was the creation of settlements in areas where civilization had not previously...Colonization
“A dimension is a domain of space and time. The Luminary's species used the fifth dimension to...Dimension
“A universe is a plane of existence characterized by space, time, and various other dimensions...Universe
“A cave is an underground passage, usually with a surface opening allowing entry. The Robinsons...Cave
This category has the following 4 subcategories, out of 4 total.