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John Davis
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Apparently, this user prefers to keep an air of mystery about them.

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18 Age of the universe and time dilation Oct 5 '14
17 Does a black hole become a normal star again? Feb 4 '15
11 Is the universe considered to be flat? Jan 3 '17
9 Could undiscovered smaller black holes within galaxies be an explanation for dark matter? Dec 8 '16
7 How can an infinite universe expand? Nov 21 '15
6 Does the cosmic microwave background change over time? Feb 4 '15
5 Why is the letter *z* customarily used to denote redshift? Dec 11 '16
5 What would the cost be of visiting an asteroid? Nov 25 '15
5 How far away is the light that would reveal the Big Bang? Feb 7 '15
5 Do objects look larger the further away they are, beyond z=1? Jan 25 '15
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