A Dragon Singularity: The Big Bang and Quantum Gravity

One of the questions I get most often is “Do you really think there are singularities at the centers of black holes?” No. I don’t. I think we still don’t understand how gravity works on quantum scales. Last week my own thoughts where brought back to the surface as I listened to a talk given by Sean Carroll that was eloquently summarized by Chris Lintott. This post isn’t a summary of Sean’s talk, but it dovetails it. Ancient maps labeled the unexplored corners of the world with the warning, “Here be dragons.” As cosmologists look back in time to the first moments of our own universe we find ourselves journeying with our minds beyond the safe boundaries of charted land. As time winds back toward zero and densities and...

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