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Fact and Fancy is a collection of seventeen scientific essays by American writer and scientist Isaac Asimov. It was the first in a series of books collecting his essays from The Magazine of Fantasy and Science Fiction, and Asimov's second book of science essays altogether (after Only a Trillion). Doubleday & Company first published it in March ...
Coal forms when organic matter builds up in waterlogged, anoxic swamps, known as peat mires, and is then buried, compressing the peat into coal. The majority of Earth's coal deposits were formed during the late Carboniferous and early Permian. The plants from which they formed contributed to changes in the Carboniferous Earth's atmosphere. [25]
Quasar, Quasar, Burning Bright is a collection of seventeen scientific essays by American writer and scientist Isaac Asimov. It was the thirteenth of a series of books collecting essays from The Magazine of Fantasy and Science Fiction. These essays were first published between May 1976 and September 1977.
Peat "hags" are a form of erosion that occur at the sides of gullies that cut into the peat; they sometimes also occur in isolation. [80] Hags may result when flowing water cuts downwards into the peat and when fire or overgrazing exposes the peat surface. Once the peat is exposed in these ways, it is prone to further erosion by wind, water and ...
Of Matters Great and Small is a collection of seventeen scientific essays by American writer and scientist Isaac Asimov. It was the eleventh of a series of books collecting essays from The Magazine of Fantasy and Science Fiction, although it also includes one essay from Science Digest. [1] It was first published by Doubleday & Company in 1975.
The Sun Shines Bright is a collection of seventeen nonfiction science essays by American writer and scientist Isaac Asimov. It was the fifteenth of a series of books collecting essays from The Magazine of Fantasy and Science Fiction. [1] It was first published by Doubleday & Company in 1981.
Coal is a type of fossil fuel, formed when dead plant matter decays into peat which is converted into coal by the heat and pressure of deep burial over millions of years. [2] Vast deposits of coal originate in former wetlands called coal forests that covered much of the Earth's tropical land areas during the late Carboniferous ( Pennsylvanian ...
A coal ball is a type of concretion, varying in shape from an imperfect sphere to a flat-lying, irregular slab.Coal balls were formed in Carboniferous Period swamps and mires, when peat was prevented from being turned into coal by the high amount of calcite surrounding the peat; the calcite caused it to be turned into stone instead.