Over the past two decades, dinosaur fossils has become a prized collection category and it's hampering scientific research.

“The tusk was found to be eroding out of the sandstone bluff on the beach there ... area in state parks,” Thorpe said. “Once the specimens are preserved so that they won’t fall apart ...

it was nearly the entire specimen, which was astounding." A team of researchers spent five years removing the surrounding sandstone from the fossils. They also took a cast of the mosasaur in place ...