People,
The lunar Crater Blancanus sits right next to the much larger and very visible crater. Clavius. But Blancanus is large, too.
The crater floor is outlined by straight lines and at least one very sharp right angle corner.
crater blancanus moon images - Pesquisar
If you want to see what mother nature didn’t do, you can always gaze at the lunar surface. People don’t do that, but the artificial outlines are everywhere.
Also, many craters, that are easily visible, have perfectly circular rims. A bit below the walled-plain type of crater named Plato there is a twosome set of up and down craters that are uniformly circular, and not small at all, and below them is another set of two that are uniforrmly circular and side by side.
Chers!