query: Does the density of matter increase as we approach the big bang?
positive_passages.docid: 21662
positive_passages.text: What was the density of the universe when it was only the size of our solar system?
negative_passages.docid: 90122
negative_passages.text: Is there experimental evidence that massless particles such as photons attract massive objects?
negative_passages.docid: 4276
negative_passages.text: Did the Big Bang happen at a point?
negative_passages.docid: 58042
negative_passages.text: Redshifting of Light and the expansion of the universe
negative_passages.docid: 3103
negative_passages.text: How do we know the universe is expanding, and not that its contents are shrinking?
negative_passages.docid: 134905
negative_passages.text: What was the entropy of the universe at the time of the Big Bang?
negative_passages.docid: 92343
negative_passages.text: Does cosmological time expand like space does?
negative_passages.docid: 10778
negative_passages.text: How Does Dark Matter Form Lumps?
negative_passages.docid: 51361
negative_passages.text: How does the Hubble parameter change with the age of the universe?
negative_passages.docid: 2073
negative_passages.text: Conservation law of energy and Big Bang?
negative_passages.docid: 75058
negative_passages.text: Why isn't an infinite, flat, nonexpanding universe filled with a uniform matter distribution a solution to Einstein's equation?
negative_passages.docid: 22090
negative_passages.text: Does the (relativistic) mass change? Why?
negative_passages.docid: 86456
negative_passages.text: Could the universe's antimatter be hiding in black holes?
negative_passages.docid: 14188
negative_passages.text: How does dark energy allow the universes expansion to accelerate?
negative_passages.docid: 112264
negative_passages.text: Cosmological constant doubts
negative_passages.docid: 66232
negative_passages.text: At what moment will matter falling into a black hole affect its size?
negative_passages.docid: 66523
negative_passages.text: Does the optical density of a medium depend upon its mass density?