Among the numerous notable facts about coal is that the United States has the most coal reserves of any other country, as of 2015. Furthermore, coal is still actively mined in 25 states and is used to provide electricity... More » Science Earth Science Geology

Fossils are the remains of plant or animal life that were buried for millions of years until they finally turned to stone. Most fossils found today are from creatures that lived in the sea, as these had a much better cha... More » Science Forensic Science

Carbon constitutes the sixth-most-abundant element in the universe, accounts for 20 percent of the weight of almost all living organisms, and makes up roughly 0.04 percent of the Earth's atmosphere in the form of carbon ... More » Science Chemistry

The first recorded discovery of coal in the United States is believed to be on the Illinois River in 1679 by French explorers. Historians, though, believe that the Chinese discovered coal more than 3,000 years ago. More »

The United States is a large nation with diverse geographical features, such as the highest mountain peak in North America, five different climates and the world's largest coal reserves, reports the Central Intelligence ... More » Geography United States

Due to the wide variety in the composition of coal, its position on the Mohs hardness would vary based on the type of coal that is measured. However, because coal is not a mineral, it would not be measured using the Mohs... More » Science Earth Science Geology

The basic difference between coal and coke is that coal is the natural source and coke is the derivative product produced by destructive distillation. Both are used as fuel, but coke contains a higher carbon content and ... More »