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 Scientists use virtual reality for fish to teach robots how to swarm Renewable energy in the dock in Spain after blackout Green nickel for sustainable electrification: Carbon-free process extracts nickel for batteries and steel Forensics tool ‘reanimates’ the ‘brains’ of AIs that fail in order to understand what went wrong How the UK’s microchip industry is bouncing back after a quarter of a century ‘Robotability score’ ranks NYC streets for future robot deployment