The egg of the largest elephant bird on the planet, with a length of 28 cm. The eggs of cliff-dwelling birds have a pointed end that allows them to spin in circles.
Eggshell collection at the American Museum of Natural History. (Photo: AMNH/C.Chesek)
: The eggshell is thin enough for the chicks to come out of the shell when the eggs hatch.
Why are the two heads of the egg different from each other?
The answer of scientists: Chickens precede eggs!