A farmer in Australia got the shock of his life when he went to collect the daily delivery of eggs from his hens.One of his hens had laid a giant egg, three times the size of a normal egg and weighing 6.2 ounces.

Scott Stockman, who runs the business, posted a photo of the incredible discovery he and his staff made at the farm.

Seeing it next to an average-sized egg it looks so unusual but perhaps what was more unusual was what they found after they cracked the egg.

Inside the egg was another egg, perfectly formed.

“It’s just incredible actually —to have two perfectly formed eggs together,” Scott told ABC News Australia.

An expert from Charles Sturt University’s veterinary sciences school said he had never seen anything like it before.

Associate Professor Raf Freire says the hen must have produced an egg as normal but for some reason didn’t lay it.

“Then the next day, rather than that egg being laid, like it usually is, what’s happened is that there’s been another ovum released,” he told ABC News.

“That’s come down and then the chicken has somehow decided to make its shell around both the previous day’s egg and the new ovum that’s come down.”