Video: See the egg in the egg

An egg surprised many Chinese when it contained two yolks and another egg.

The 87-year-old grandmother, the owner of the strange egg laying hens, said she had never seen this strange phenomenon before. The main feed of chicken is rice, Metro reported.

This egg is three times larger than a normal egg, which weighs more than 200 g. Initially the chicken owner thought it would die after laying such a large egg, but the chicken was still alive.

Some experts believe that two eggs hatched in two days may have mixed together, when the hen didn't lay the first egg the day before. Another theory is that certain disorders in the muscles contracting the inside of the chicken make an egg fall into another developing egg and form a double egg.