Why was Columbus theory to reach Asia by sailing west so daring?

Columbus's theory to reach Asia by sailing west was daring because it challenged the prevailing understanding of the world's geography at the time, which underestimated the vastness of the Atlantic Ocean and overestimated the size of the Earth. Many believed that a westward route would lead to an insurmountable expanse of ocean before reaching Asia. Additionally, Columbus's proposal required not only significant financial backing but also a leap of faith in the face of skepticism from educated contemporaries. His voyage ultimately resulted in the unexpected discovery of the Americas rather than a direct route to Asia.