Some science leading into the APS Global Physics Summit

Next week is the annual APS conference that was once the March Meeting and is now the combined March/April "Global Physics Summit". As I've done annually, I will try to give some impressions of interesting talks that I see, hopefully at an understandable level. This year I'm only there from Monday through late Thursday morning, so I may miss exciting things - hopefully people will still discuss such things here as has happened in past years. A few science tidbits in the meantime: - People...