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Ice
posted by jjray on Apr 15, 2012 - 33 comments

Amalie Noether: The Mighty Mathematician You’ve Never Heard Of
posted by jjray on Mar 27, 2012 - 49 comments

to talk about the concept of "time" before the big bang; the Cyclic Universe Theory proposes an alternative to the predominant Inflation Theory that led to this intuition. Now Gurzadyan and Penrose have observed low-variance rings in the CMB, supporting the notion that it makes sense
posted by jjray on Nov 27, 2010 - 41 comments

Circular jumps (previously) form when you turn on your tap and the water lands in a thin circular disk with a raised lip. Jannes et al have now shown that circular jumps are examples of hydrodynamic white holes: waves can escape the jump, but not enter it. [more inside]
posted by jjray on Nov 13, 2010 - 19 comments

Physicist Erik Verlinde proposed in a recent paper that the force of gravity can be derived from the principles of thermodynamics. NY Times explains. [Physicist Lee] Smolin called it, “very interesting and also very incomplete.”
posted by jjray on Jul 12, 2010 - 55 comments

The Unreasonable Effectiveness of Mathematics in the Natural Sciences is a 1960 essay by Eugene Wigner. Via Steve Strogatz.
posted by jjray on Jan 31, 2010 - 30 comments