Scientists breed yeast to try to make beer tastier

What gives beer its flavour? Why do so many lagers have fundamentally the same taste? And what are scientists doing to try to diversify brewers' limited options when it comes to one of beer's fundamental ingredients?

Torah Kachur discusses those efforts and more with radio host Joan Weeks in this week's science column. She even speaks to a Belgian geneticist about efforts to get yeast to copulate and whether it involves music by Barry Manilow.

Listen to the segment here.