“Mazon Creek fossils are extraordinarily important to ... Perhaps Illinois’ most famous find is the Tully Monster, now the state fossil. In 1958, pipefitter Francis Tully unearthed the half ...

Illinois’ commercial fossil trade is alive and well thanks to collectors who are motivated by money, science and the hunt — and who test the outer bounds of legality.

The cool thing about fossils is that you never know what you ... “Douglassarachne acanthopoda comes from the famous Mazon Creek locality in Illinois and is about 308 million years old.