A single boulder at a regional school in central Queensland was hiding 66 fossilized footprints in plain sight. Researchers that 47 individual dinosaurs made marks on the boulder, which originally came from a nearby mine and was given to a local high school.

Australia has long been a hotspot for dinosaur fossil discoveries, and a new revelation has added to that legacy: a 200-million-year-old dinosaur footprint was found hidden in plain sight at Biloela State High School.

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. For most, it was just an impressive rock with multiple chicken-like tracks.