What did the woman think of the new wing of the museum?

M: Hey! How was your trip?
W: Wonderful! I spent most of my time at the art museum. I especially liked the new wing. I was amazed to hear the guide explain all the problems they had while building it.
M: Right. I just read an article that went on and on about the cost. Ninety million total, I think.
W: Yeah, the guide mentioned that, you could see they spared no expense.
M: Huh. It looked really unusual, at least from what I saw in the picture.
W: It is. The basic design is two triangles. In fact, there are triangles all over. The paving stones in the courtyard, the skylights, and even a lot of the sculptures. One sculpture is a mobile. It is in the courtyard, and it’s made of pieces of aluminum that move slowly in the air. Really impressive.
M: That was in the article, too. It is said the original was steel and it weighed so much that it wasn’t safe to hang.
W: Right. They did it over in aluminum so it wouldn’t come crashing down on someone’s head.
M: You know the article went into that in details. There was even an interview with the sculptor.
W: I’d like to read that. Would you mind if I borrow the magazine sometime?
M: No, I wouldn’t mind, if I haven’t thrown it out yet.