The huge egg, which was 8.1 centimeters high and weighed 158 grams, was laid at the Yokaichi Minami High School in the city of Higashiomi in late October. The egg was scheduled to be displayed after grabbing headlines in local and national newspapers.
But school teachers decided on Friday to remove the shell by using a scalpel and tweezers after finding a crack. They later discovered another medium-sized egg inside the giant egg as the yolk and the white portion spurted out.
There are now plans to break the second egg to see what's inside. http://www.japantoday.com/category/national/view/second-egg-emerges-from-giant-chicken-egg-found-at-japan-high-school -Thanks, Geekazoid!