How Alexa is listening

image of a circular smart speaker
Umar Iqbal, a computer security expert from Washington University, explains how smart speakers process user data.

Crystallizing time

time crystal
Physicists in Arts & Sciences have created a new phase of matter in the center of a diamond. They created a new form of time crystal called a discrete-time quasicrystal. Such states could be useful for high-precision sensing and advanced signal processing.