Sister Discover Blog 80beats reports:
Fossilized dinosaur embryos, found still in their eggshells, have claimed the title of the oldest vertebrate embryos ever seen–they were fossilized in the early Jurassic Period, around 190 million years ago, researchers say. The embryos are from the species Massospondylus, a prosauropod, the family of dinosaurs which gave rise to iconic sauropods like the Brachiosaurus.
Of course, just because we found the well-preserved bones of a dinosaur embryo doesn’t mean we can bring the thing back to life with a snap of the fingers (or even with a crack scientific team “sparing no expense”). But remember that most scientists were very skeptical that any viable tissue could be found in dinosaur bones until Mary Schweitzer did just that—and faced a lot of misguided attacks before her results were confirmed.