The scientists in Montana, US found the fossil remains of small dinosaurs that burrowed into the ground
The 95-million-year-old bones are from an adult and two juveniles and were unearthed in a chamber at the end of a 2.1m-long sediment-filled tunnel. Scientist says this is the evidence to say that dinosaurs dig duns to care their young.
The Montana dinosaurs have not been seen by palaeontologists before and have been given the scientific name Oryctodromeus cubicularis, meaning "digging runner of the lair".
Scientist say this is the first and foremost discovery they made about this and every one should realise the meaning of discovery.
Professor Padian bemoaned the impact of commercial fossil hunting which, he claimed, sought to get specimens out of the ground as fast as possible, often destroying valuable scientific information in the process.