If the rule of threes holds, it's a strange time to be a U.S. governor. From bears in bird feeders to snoozing to Springsteen, Melissa Block recounts a trio of oddball things governors from Vermont, North Dakota and New Jersey have had to deal with in the last week or so.

It was supposed to be a routine and quick bond hearing for George Zimmerman, the neighborhood watch volunteer who killed teenager Trayvon Martin. Friday's court hearing was anything but routine; Zimmerman took the stand and apologized to Martin's parents.

This week, music is bringing Americans and Russians together in a way that policy discussions never can. And don't call that a cliche in front of the music director of the Chicago Symphony Orchestra.

If U.S. relations with Russia have hit a sticky patch over Syria and other issues lately, that didn't stop the Chicago Symphony from thrilling a Russian audience this past Wednesday night, just as it did on its last visit — to the then-Soviet Union in 1990.

If diet is destiny, then modern humans should thank our ancestors for their ability to eat just about anything.

Two new studies peek into the distant past to try to figure out just how big a role food played in human evolution. One says that eating meat made it possible for early human mothers to wean babies earlier and have more children.

Transcript

IRA FLATOW, HOST:

This is SCIENCE FRIDAY. I'm Ira Flatow. We're here in California, broadcasting from the California Academy of Sciences in San Francisco. And just outside the Golden Gate, of course, is the Pacific Ocean. It is the largest body of water on Earth, and its trenches are also the deepest. You could put Mount Everest into some of them, and the top would not even peek out.

A Dutch virologist is considering his full range of legal options if his government refuses to lift the restrictions it has put on his controversial bird flu research, and matters could quickly come to a head after a meeting next Monday that will be attended by U. S. observers.

There's another bit of tragic news to report today: 43 people are dead after a truck crashed into a passenger bus in eastern Mexico today. Authorities told the AFP that the incident happened after a trailer came loose and hit a bus carrying agricultural workers headed to work.

The AP reports: