"...The only intact chicken's egg found from Roman Britain is now thought to be the only one of its type in the world - after scientists found it still had liquid inside.
The egg, which is about 1,700 years old, was found during a dig in Aylesbury in Buckinghamshire.
Researchers said at the time it was a "genuinely unique discovery".
However, they admitted they were "blown away" recently to find it still contained the yolk and egg white.
A micro CT scan - that produces 3D images - revealed the contents of the egg, complete with the air sac..."