This Week

NATURE: Parenthood Grasslands Animal parents must balance risk and reward to raise their young in grasslands. In Zambezi, wild dogs must focus the energy of their unruly teenagers for survival, and in India, an expecting langur learns parenting skills by babysitting.

NOVA Can Dogs Talk? Do speech buttons really allow dogs to talk to us? Scientists investigate.

SECRETS OF THE DEAD The Quest for Camelot A professor seeks to prove Arthurian legends have roots in actual British history.