THE WEEK'S MOST POPULAR R&B ALBUMS, BASED ON MULTIMETRIC CONSUMPTION, BLENDING TRADITIONAL ALBUM SALES, STREAMING-EQUIVALENT ALBUMS AND TRACK-EQUIVALENT ALBUMS, AS COMPILED BY LUMINATE ...

THE WEEK’S MOST POPULAR CURRENT R&B/HIP-HOP SONGS ACROSS ALL GENRES, RANKED BY STREAMING ACTIVITY DATA BY ONLINE MUSIC SOURCES TRACKED BY LUMINATE, RADIO AIRPLAY AUDIENCE IMPRESSIONS AS MEASURED ...

B cells are a subtype of lymphocyte. They form part of the adaptive immune response and mediate humoral immunity. B cells can produce high-affinity antibodies and generate immunological memory ...

Guest: Miriam Pawel is an award-winning reporter and editor who spent twenty-five years working for Newsday and the Los Angeles Times. She is the author of The Crusades of Cesar Chavez: A Biography.