HumansWho invented the alphabet? The untold story of a linguistic revolutionOne of civilisation’s most revolutionary inventions was long thought to be the brainchild of ancient Egyptian scribes. But its true creators may have been far less glamorousFeatures
PhysicsThe plucky probe that put the big bang theory to the test30 years ago, cosmologists launched the COBE satellite to glimpse the “afterglow of creation”. Its measurements revealed the universe’s history and fate in unprecedented detailRegulars