No institution in the world accepts the idea that the earth is flat.

If it's flat then why is the sun at different angles in the sky based on latitude? Why are some stars visible in some latitudes and not in others? Isn't it because of a round earth showing different parts of the sky at different angles?

Why can't you see for hundreds of miles from a mountain top? Why can't you see the Rocky Mountains from the Sears Tower? Why is visibility limited to about 35 miles?

Since the earth as a circumference of about 25,000 miles then there should be some flights that are 20,000 miles long and there aren't any.

Why is the flight from Los Angeles to Tokyo so short? It's 5500 miles yet every flat earth model has Asia and Japan on the far right with the western hemisphere on the left. How is that possible?