Even off the air, Jad Abumrad and Robert Krulwich, well-known as the hosts of “Radiolab,” have a chemistry that just works. They giggle and bicker. They finish each other’s sentences and thoughts. They start stories and get lost in tangents. They’re an old married couple, without being old or married.
They started as something of an echo, to hear Krulwich tell it. With a 25-year gap, Krulwich and Abumrad attended the same college, accepted their first jobs at the same radio station, then moved on to NPR and New York.