Linkage

Telemetry: Tessellated paper sculptures by Matthew Shlian

Polygonal billiard paths, after the work of Iranian-American Fields medalist Maryam Mirzakhani

We are all Iranians: Lance Fortnow speaks out about the travel ban and its affect on his colleagues

David Wood shares the saga of the journal publication of one of his papers, highlighting the long and unnecessary delays in the system (G+)

A tantonalizing problem: Brian Hayes tracks down the original proof of the non-integrality of the partial sums of the harmonic series (G+)

Code that generates a mandala

Terence Tao on a problem resembling 3SUM, but with disjoint set union instead of addition

How dynamic demands cause tree veins not to form trees

Daily Mail officially declared non-reliable (G+)

The Calkin–Wilf tree in the works of Kepler (G+)

Notable women in science (in Spanish) for the International Day of Women and Girls in Science

How to apportion the rent for unequal rooms in a shared apartment, using combinatorics (G+)

Congressional Republicans zero out the budget of the office that tests and certifies the security of voting machines

Don't travel internationally with electronic devices unless you want to give the feds all your passwords