Since birds are dinosaurs, we have long assumed the quick way that birds exit their shell was mimicked in their much larger and significantly more extinct brethren.
However, it turns out that it takes much longer (3-6 months) for a dinosaur to exit its shell.
Why does that matter? Well it might have put them at a disadvantage relative to faster producing animals, like mammals and modern birds.
Curious how scientist figured it out (No, they didn’t clone dinosaurs like Jurassic Park… yet)? Check it out over at Science.