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According to the new study, the chemical composition of the spherules most closely resembled contaminating coal ash from human industrial practices—not alien construction materials or even a ...

Over the years countless Superman comic books, TV shows and movies have shown the fabled Kryptonian crushing clumps of coal between the ... let's look at the chemical compositions of these two ...

The results showed significant differences in sulfur isotope composition between coal and its combustion ... crusts involves ...

The composition of the benchmark for the price of imported coal is likely to change with a higher weightage to Indonesia vis-a-vis Australia. A revised index is likely to bring down coal prices as ...