What caused the moon to have dark spots?

What is big dark spot on thee moon?

When you look at the moon, you see a large area is dark. Until now no one answer this question.

The answer the google says is this. There are there, because of the shadow that been made by rocks, and this is wrong answer, and why, those dark spot is as big as a country like Iran, no rock can make such big shadow

That dark part of moon, what we can see from the earth means only one thing.

The surface of the Moon is made in too different Material.

1. The material which can reflect the sun light like a mirror

2. The material which can not reflect the sunlight

When you be on moon in the night, you can see the earth , but the earth can not reflect the light, and it is not like moon for earth, it most like Mars, a little brighter because is nearer. by kavoos zijerdi