Donut shape. The answer that the Earth is round or flat is too mainstream. So I'll give a more extraordinary answer: the Earth is a donut shape.
The question of whether the Earth is flat or round has come up frequently. However, I didn't expect a question about the Earth's shape. This information was already provided to elementary school students in the 1990s. Every elementary school has a globe and a world map in its classroom.
Astrophysicists have so far stated that it is indeed possible for a celestial body to be shaped like a donut. This occurs due to extremely rapid rotation, gravitational interactions with other objects, and instability of the protoplanetary disc during its infancy. All of these factors make the donut shape possible, although no definitive proof has been found.
However, in a larger structure, we can see the donut shape of the Helix Nebula.