This is TELL ME MORE, from NPR News. I'm Michel Martin. Coming up, March Madness 2013 is now a memory, but there's still one champion yet to be announced. Yes, we are going to announce the winner of our TELL ME MORE March Madness Challenge. That's just ahead.
This is SCIENCE FRIDAY, I'm Flora Lichtman, filling in for Ira today. You know the phrase you are what you eat? Well, new research suggests a slight modification: Your gut bacteria are what you eat. And if you eat more red meat, for example, you'll nurture populations of microbes that like to eat red meat, too, which might not seem like a bad thing except that researchers have pinpointed a compound in red meat called L-carnitine that when broken down by gut bacteria might contribute to heart disease.
This is SCIENCE FRIDAY. I'm Flora Lichtman. Later in the hour, a teenage science activist and the plight of the monarch butterfly. But first, researchers have developed a new way to fight antibiotic-resistant microbes by borrowing a trick from a longtime foe of the bacteria, the bacteria phage.