The earth is not flat.
That is correct. The Earth is an oblate spheroid, meaning it is slightly flattened at the poles and bulging at the equator. This shape is due to the Earth's rotation, which causes a centrifugal force that pushes the equator outward. The concept of a flat Earth has been debunked for centuries, and ample evidence from various fields such as astronomy, geology, and physics further supports the fact that the Earth is not flat. Some of this evidence includes satellite images, the Earth's gravity, and the way in which the Earth casts a round shadow on the Moon during a lunar eclipse.
and why there are still people believing in a flat earth?
There are several reasons why some people still believe in a flat Earth despite overwhelming evidence to the contrary. These reasons can include misinformation, distrust of authority, a desire for a sense of community or belonging, and confirmation bias. Misinformation can spread rapidly on the internet, leading to the perpetuation of false ideas. Additionally, some individuals may distrust scientific institutions and authorities, leading them to question the validity of widely accepted scientific knowledge. Joining a community of flat Earth believers can provide a sense of belonging and support, which may be appealing to some. Lastly, confirmation bias can lead individuals to interpret evidence in a way that supports their existing beliefs, while disregarding any contrary evidence.