110 million years ago, when this burrow was dug, the southeastern coast of Australia was adjacent to Antarctica.
The burrow is strikingly similar to another one found in Montana in 2005, which held the remains of a 96-million-year-old dinosaur family.
Illustration by James Hays, Fernbank Museum, via National Geographic News
"Right now burrowing dinosaurs might look like an exception to the rule," he said. "But I wouldn't be surprised if more species [dug burrows]. Ten years from now it might be considered commonplace."
--Emory University paleontologist Anthony Martin