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.
Liquefied natural gas (LNG) Natural gas, the cleanest-burning hydrocarbon, is a major source of energy. But many energy-hungry places are located far from gas fields, making pipelines too impractical or costly to build. We cool natural gas to make a liquid, shrinking its volume for easier, safer storage and shipping overseas.