Page last updated at 13:36 GMT, Thursday, 12 March 2009

Egg inside egg found at breakfast

Double egg shell
The phenomenon is known as "ovum in ovo"

A woman from Somerset discovered another egg inside the boiled egg she was preparing to eat for her breakfast.

Ann Lewis, 47, from Taunton, said she had eaten plenty of "double-yolkers" before but that she was very surprised at the unusual find.

Douglas Russell, from the Natural History Museum, said: "A complete egg found within a complete egg is relatively rare."

Ms Lewis, who works as a waitress, bought the egg from a local farm.

Experts puzzled

Douglas Russell, speaking about the phenomenon in the New Scientist, said: "As the curator of the British Natural History Museum egg collection, I've come across quite a few examples of egg oddities.

"Double eggs (as opposed to multiple-yolked eggs) are less common than some other zoological anomalies and consequently the ovum in ovo has attracted specific scholarly attention for hundreds of years.

"Several theories have been proposed for the origin of double eggs.

"The most likely suggests that the normal rhythmic muscular action, or peristalsis, that moves a developing egg down the oviduct malfunctions in some way."

Print Sponsor

The BBC is not responsible for the content of external internet sites

Has China's housing bubble burst?
How the world's oldest clove tree defied an empire
Why Royal Ballet principal Sergei Polunin quit


Sign in

BBC navigation

Copyright © 2018 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Americas Africa Europe Middle East South Asia Asia Pacific