But have you ever heard about Piltdown Man? I was taught this as fact, when I was at school (and I'm not _that_ old): https://en.wikipedia.org/wiki/Piltdown_Man
It is now an admitted fake. Why would they fake it?
Anyway - it seems that sometimes this research is faked. Is it possible that in 30 years some of those examples are also admitted as fakes?
(you can also look into: https://en.wikipedia.org/wiki/Bone_Wars)
I actually think it is possible for a body to be buried in a bog, and perhaps be in reasonable condition after 100s of years.
Do you think an egg would last though? For 1000 years (as per another commentor), until it fossilises? And then not be assimilated into the rock that it is surrounded by? And then be found? And then be cracked open to reveal the skeleton inside?
Can I get some odds on that please!!