But for much of this hour, we'll take a different tack and talk about the value of partisanship.

NPR: Does Partisanship Have Its Place in Politics?

Three main factors seem to have brought about the Russian change of tack.

ECONOMIST: Caspian carve-up | The

Dr Kobilka - who is now at Stanford University in California - joined the HHMI team in the 1980s, and they took another tack to discover how the receptors come about, searching within the human genome for the code that lays out the genetic instructions for them.

BBC: Chemistry Nobel goes to Robert Lefkowitz and Brian Kobilka