Why the plane's windows are rounded?

Have you ever thought why the plane's windows are rounded? Is it just a design or there is a reason behind it?

Starting from ordinary standards to Homer-chomeradera VIP planes, everywhere the shape of the window is round. The technology of the aircraft has changed many times and diversity. But the plane's windows are round all the time. There is a special reason behind this.

Jetline planes became fashionable in the 1950s.Then its design was made to make diverse durable circular windows, square shaped. These planes were quite fast. But by 1953, two horrible planes crash occurred and 56 passengers died. What was the reason? Nothing else, that square window.

Whenever there is a square window in the matter, then there are four corners being formed. These corners create a relatively weak space that is not able to withstand the pressure of air. If there is a circular window then there is no risk for creating this angle or weak spot.That's why the plane's windows are always circular.