riverrun, past Eve and Adam's, from swerve of shore to bend of bay, brings us by a commodius vicus of recirculation back to Howth Castle and Environs.
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
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]
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.”
The Unreasonable Effectiveness of Mathematics in the Natural Sciences is a 1960 essay by Eugene Wigner. Via Steve Strogatz.