Flat earth education

Yet they say they discovered the world was round 2000 years ago in the year 0024 but education was still teaching flat earth. Sounds like the lie they kept saying became truth. A circle is not a sphere, spheres are geometric and not naturally shaped if all the planets are spheres where are the spherical rocks? You cant find them unless man created them. Gravity did not shape the planets in to spheres there would still be spherical formations of all sizes on the planet. And if gravity was strong enough to create a sphere why can we make a candle balloon with just some heated air float away?