p. 103
「地球丸い。『西』へ進んでも、アジアへ行き着くはずだ」と、海の地図（海図）や、星の動きなどを勉強したコロンブスは、考えました。
Columbus, who had studied maps of the oceans (sea charts), the movement of the stars and the like, thought: “The Earth is spherical. Even if you go to the ‘West’, you should end up in Asia.”
それは、誰も試そうとは思わないような考えでした。
It was an idea that nobody had ever thought of trying out.
そのころは、西の海に行けば、悪魔がいると信じられていたくらいですから。
The reason was that in those days it was believed that if you went to the western sea, the devil would be there.
一四九二年、コロンブスは、サンタ・マリア号という船に乗り、他のニ艘の船と共に、海に出ました。
In 1492, Columbus boarded a ship called Santa Maria and, along with two other ships, set out to sea.
According to deepl, this did not happen in 1492, but in 1942!