More than 300 million years ago, during the Carboniferous Period, much of northern Illinois outside Chicago—including what is ...

This extraordinary tree has stood tall since long before the Pyramids of Giza were built, however, its exact location is a closely-guarded secret.

A study on ancient rocks reveals how fossil fuels form: abundant life, salty water, some oxygen, and crucial protection from clay minerals washed in from land preserve organic matter, even without ...