The Download: hunting for new matter, and Gary Marcus' AI critiques

In 2012, using data from CERN's Large Hadron Collider, researchers discovered a particle called the Higgs boson. In the process, they answered a nagging question: Where do fundamental particles, such as the ones that make up all the protons and neutrons in our bodies, get their mass? When the particle was finally found, scientists celebrated with champagne. A Nobel for two of the physicists who predicted the Higgs boson soon followed. But now, more than a decade later, there is a sense of unease.