Simplify the following text for a Grade 4 native English-speaking person.
Original: Remains of Aepyornis adults and eggs have been found ; in some cases the eggs have a circumference of over 1 m and a length up to 34 c. The egg volume is about 160 times greater than a chicken egg .
Simplified: Remains of Aepyornis adults and eggs have been found . In some cases the eggs have a circumference of over 1 m and a length up to 34 c. The egg volume is about 160 times greater than a chicken egg .