My favorite mind-blowing Machine Learning/AI breakthroughs

Compared to other fields, machine learning / artificial intelligence seems to have a much higher frequency of super-interesting developments these days. Things that make you say "wow" or even "what a time to be alive!" Disclaimer: I'm not using any rigorous definition of "mind-blowing" or "breakthrough"; it's a casual list.. and I might use less rigorous terminology to make this post more accessible We can accurately estimate how a human on the other side of a wall is standing/sitting/walking just from perturbations in Wifi signals caused by that human. The researchers first demonstrated in 2014 that they can e.g. This part was done without machine learning.