Dozens of dinosaur footprints embedded in a boulder were found hiding in plain sight at an Australian school, according to researchers.

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,

A trove of fossilized dinosaur footprints has been found on a slab of rock gathering dust inside an Australian school, scientists said on Wednesday.

"They did not know that this was an actual fossil itself. Some were thinking that it was a replica," Australian paleontologist Anthony Romilio said.

A rock slab that's been stored at a high school in Queensland, Australia, for 20 years reveals 66 dinosaur footprints from the early Jurassic period.