By 10â12 million years ago, the hyena family had split into two distinct groups; that of the dog-like hyenas and the bone-crushing hyenas. The arrival of the ancestral bone-crushing hyenas coincided with the decline of the similarly built but unrelated Percrocutidae family.
Whiting Petroleum Corporation is a Denver-based oil and gas exploration and production company. The company focuses on exploitation of lower risk properties, primarily on those located in the Gulf Coast, Permian Basin, Rocky Mountains, Michigan and Mid-Continent regions of the United States.
Propane is a hydrocarbon and is sometimes referred to as liquefied petroleum gas, LP-gas or LPG. Propane is produced from both natural gas processing and crude oil refining, in roughly equal amounts from each source. Most propane used in the United States is produced domestically, with about 15 percent imported. It is nontoxic, colorless, and virtually odorless. As with natural gas, an identifying odor is added so the gas can be readily detected. Propane is one of the cleanest burning of all fossil fuels and it fulfills energy needs by efficiently giving consumers more value for their energy dollar.