A mammoth find in Florida Teen makes mammoth fossil find in Pinellas County

A 16-year-old high school student stumbled upon what archaeologists say could be the biggest fossil find in Pinellas County in nearly a century.

A shiny black rock caught Sierra Sarti-Sweeney's eye as she was taking pictures last month in Boca Ciega Millennium Park.

"I looked down and saw a huge bone that could not be a rock. Most of it was exposed, but we dug and found that it was bigger and bigger. I thought, 'Oh my gosh, what are these? Are they people bones?'" she said.