|Elephant Bird Skeleton and Egg|
A recent article published in the Royal Society journal offers a new possibility in recovering fossil DNA, however. Scientists looked, not to bones, but to eggshell to try and extract DNA. They successfully recovered genetic material from the eggshell of Aepyomis, the elephant bird of Madagascar, for the first time. They were also able to get DNA from New Zealand duck and moa eggshells, and Australian emu and owl eggshells, the oldest of which was 19,000 years old. Because eggshells are pretty resistant to decomposition, it makes sense that they would preserve the DNA better than bone.
This is an exciting step towards perhaps getting a fuller understanding of extinct species. It's still no where near dinosaurs, but it provides a new way to look. It will be interesting to see where this sort of research takes the studies of zoology and paleontology in the future.
Source: Discovery Channel- Fossilized Eggshells Yield DNA