A really good egg

 

Scientists/researchers/paleontologists/explorers -- whatever they are, these guys found a dinosaur egg with a fully-developed dinosaur embryo inside.

And that doesn't happen very often.

Impeccably preserved dinosaur embryo looks as if it 'died yesterday'

"Baby Yingliang's egg — unearthed in the city of Ganzhou, in southeastern China, in 2000 — wasn't analyzed until 2015. That's when Yingliang Group, a Chinese stone company that had acquired the egg and put it into storage, rediscovered the fossil during the construction of Yingliang Stone Natural History Museum, a public museum in Xiamen, China. 

 "Fossil preparation was conducted and revealed the beautiful skeleton of the embryo," Ma said. "It is one of the best-preserved dinosaur embryos ever reported in science." "