Walmart's Veggie-Tracking BLT: Blockchain Lettuce Technology

ImageWalmart says it now has a better system for pinpointing which batches of leafy green vegetables might be contaminated.CreditCreditCharlie Bennet for The New York

Technology, Humanity, and the Existential Test

Can we govern ourselves? Will we? If you pull far enough back from the day to day debate over technology’s impact on society – far