An archaeological dig in Britain’s Buckinghamshire recently hatched something the world has never seen before: a fully intact egg at least 1,700 years old. It’s the oldest unintentionally preserved egg in the world, and if that’s not enough, researchers found that the egg remains completely full of its original liquid.

“The fact that the egg still retains its original contents, however, is absolutely incredible,” said Edward Biddulph, senior project manager of Oxford Archaeology, according to the BBC. “We were absolutely blown away when we saw the contents in there, as we might have expected them to have leeched out.”

Amazing.

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