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RE: Nasa Professor presents a lecture on “Physics of Black Holes”
I said in the end : (Source: University Web site).
I meant by that that's not own post, so I mentioned that there's a source that's not me! .. Yes, maybe that's not very clear but I think it's because of my weak English language so I couldn't say that very clearly. I'm sorry. And I add 4 more photos that are not exist in the source !
Please take that in consideration . Thank you!