query: If extra dimensions are out there, why don't/can't we see them?
positive_passages.docid: 145245
positive_passages.text: Extra Dimensions (in String Theory) - What does it mean?
negative_passages.docid: 43505
negative_passages.text: Why is there no gravitational magnetic field? (Or, is there?)
negative_passages.docid: 139471
negative_passages.text: What if the size of the Universe doubled?
negative_passages.docid: 124631
negative_passages.text: Why are we not able to visualize Dimensions beyond 3 (or maximum 4 including time)?
negative_passages.docid: 47082
negative_passages.text: If spacetime itself is expanding, how could we ever tell?
negative_passages.docid: 64158
negative_passages.text: What do we learn from gravity in three spacetime dimensions?
negative_passages.docid: 57945
negative_passages.text: How do we know dark matter isn't curved spacetime?
negative_passages.docid: 125620
negative_passages.text: How do we know for certain that space is expanding?
negative_passages.docid: 152130
negative_passages.text: Maximum size of the observable universe?
negative_passages.docid: 38703
negative_passages.text: Do virtual particles actually physically exist?
negative_passages.docid: 152194
negative_passages.text: How far can characters see?
negative_passages.docid: 148726
negative_passages.text: Are we living in a false vacuum? Is there any way to tell?
negative_passages.docid: 72416
negative_passages.text: The universe appears to have a lower bound in the time dimension, why not an upper bound?
negative_passages.docid: 99374
negative_passages.text: Can we observe an edge of the universe?
negative_passages.docid: 22682
negative_passages.text: If everything in the universe doubled in size overnight, would it be noticeable?
negative_passages.docid: 113249
negative_passages.text: Does time exist in a vacuum?
negative_passages.docid: 13502
negative_passages.text: What if the LHC doesn't see SUSY?