Amazon is raising free-shipping minimums for some customers who don’t have Prime memberships Amazon has been quietly raising the amount some customers must spend on its site to get free shipping.This article was originally published on this website. Read More Forest-based resins challenge fossil materials in wind turbines, boats and high-performance adhesives Researchers pioneer next-generation AI semiconductors with ‘thermal constraining’ technique US AI giants accuse Chinese rivals of mass data theft A new way to study how cannabis use impacts safe driving Mixing generative AI with physics to create personal items that work in the real world Robotaxis are coming to London. The city’s famed black cab drivers are skeptical