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When paleontologist Martin Qvarnström began peering inside 230-million-year-old fossilized dinosaur dung using an advanced X-ray technology, he wasn’t sure he’d see anything of interest.
As a proof-of-concept, the researchers made more than 50 nanoscale objects, including a "nano-dinosaur," a "dancing robot" and a mini-Australia that is 150 nanometers wide, a thousand times ...