'Baby Yingliang' dinosaur fossil shows remarkable similarities to modern birds By Doug Cunningham UPI Dec. 21, 2021 / 2:53 PM The "Baby Yingliang" fossil shows a theropod dinosaur apparently just a few days before it would have hatched. It can be seen inside a 6-inch elongated eggshell. Image courtesy of iScience Dec. 21 (UPI) -- A 66 million-year-old complete baby dinosaur fossil called "Baby Y..