"It's incredible to think that a piece of history this rich was resting in a schoolyard all this time." In 2002, coal miners in Queensland, Australia, uncovered a rock slab with several three-toed footprints preserved in it.

Learn more about the schoolyard dinosaur discovery, which found 200-million-year-old fossilized footprints on a boulder from Australia's Early Jurassic period hiding in plain sight.

A large boulder used as decoration in a rural Australian high school’s foyer is actually covered in dinosaur footprints —it just took around 20 years for anyone to notice. After examining the ancient rock,

This schoolyard boulder with ancient footprints is revealing a vibrant moment in Australia's prehistoric past.

For more than 20 years, a simple white slab sat in the main office of Biloela State High School, blending into the background. It was a relic of the nearby Callide Mine, a gift to the school by a geologist.