In pop culture, this is called the "uncanny valley." It addresses the time when something looks almost, but not quite, natural. Ultimately, the close kinship between the "natural" and the "unnatural" causes individuals to feel revulsion. To get some idea of what the uncanny valley feels like, watch the video below.

And what about the other monster, the most famous one in our galaxy, Sagittarius A? How do we know that this complex radio source is really a black hole? And is it a good thing, or a bad thing for our galaxy? Most importantly, is it going to eat us?

Today, Dr. Grant Gutheil, Associate Professor of Psychology at Nazareth College in Rochester NY, and astrophysicist Brian Koberlein discuss these interesting monsters.

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