Sean Carroll of Cosmic Variance made his way to Pittsburgh on Friday. Sean and I managed to solve the problems of the Universe over lunch (more or less), before his…
Soul Physics Meets Cosmic Variance
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Another Unexpectedly Simple Failure of Determinism
Here’s a simple Newtonian system that fails to determine a unique Cauchy evolution, in the spirit of Norton’s dome. In the system I will describe, one begins with a mass…
Possible Positions on the Passage of Time
Presentism The present exists; the past and the future do not. Block The past, present and future all exist. Growing Block The past and present exist; the future is coming…
No, there are STILL no deadly mini-black holes!
Kentucky, who runs a fantastic blog over at arxivblog.org, has pointed out a new calculation about black hole creation here on earth. The paper (arxiv) suggests that mini-black holes might…
Group Structural Realism (Part 4)
Part 1 | Part 2 | Part 3 | Part 4The Higher Structures Problem. My worry about structural realism starts with the observation that a relation is a very general…