Scientists know birds' eggs are shapes. People once said chicks came from eggs, but that was . Scientists say the makes birds fly . A said birds have changed to lay that have different shapes - from a owl's egg to a pointy sandpiper egg.
The looked at 50,000 from 1,400 different bird . They looked at the shape, and height of the eggs. Birds with the -oval-shaped eggs were the best . Hummingbirds have the most--shaped eggs; have the eggs; and birds have the pointiest eggs.