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.

Scientists say the discovery of 66 footprints on a rock at a Queensland high school are a huge breakthrough in understanding early Jurassic dinosaurs.

Fossilised dinosaur footprints have been discovered on rock that was sat in a school entrance hall for 20 years

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.