From NPR News

New York City has been referred to as a concrete jungle. But researchers say it is more 'jungle' than you might think. A panel of experts discuss the plant and animal life found in city waters and green spaces. They also discuss the impact of urbanization and climate change on a city's biodiversity.

Did you know Mayor Michael Bloomberg has an engineering degree and built a ham radio as a child? The mayor talks about his passion for science and how it shapes the way he thinks. He also discusses plans for an applied sciences campus in New York and potential spin-offs from the project.

The first Homo sapiens appeared on the planet some 200,000 years ago. But even though they looked fully human, they didn't act fully human until they began creating symbolic art, some 100,000 years later. Paleoanthropologist Ian Tattersall discusses those human origins in his book Masters of the Planet.

Coyotes were first spotted in New York City in the 1990s. Now they are thought to be permanent residents of the Bronx, and have been seen in Queens and Manhattan. Wildlife biologist Mark Weckel, of the Mianus River Gorge Preserve, is documenting their immigration through camera traps in New York City parks.

Opinion about the Trayvon Martin shooting is sharply divided by race, a new USA Today/Gallup poll finds.

The divide is clear, when pollsters asked if George Zimmerman, the Neighborhood Watch volunteer who shot and killed the black, unarmed teenager, was guilty of a crime.

A little more than half of the African Americans polled said he was "definitely guilty," while only 15 percent of non-blacks shared the same opinion.

The poll also found:

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MICHEL MARTIN, HOST:

The city's leaders agreed to a compromise with state officials this week, that may save Detroit from bankruptcy. But Detroit Free Press columnist Rochelle Riley tells host Michel Martin that a lot more work needs to be done to save the struggling city. They're also joined by NPR Senior Business Editor Marilyn Geewax.

Mitt Romney's sweep in Tuesday's primaries essentially signals the beginning of the general election campaign. And President Obama joins the fray, attacking Romney by name in a speech to news editors; the former Massachusetts governor returns the favor a day later. Paul Ryan draws attention from the president as well as those speculating on the GOP ticket. NPR's Ron Elving and Ken Rudin have the latest in this week's political roundup.

It sounds like the plot of a Dan Brown thriller: A powerful medieval pope makes a secret pact to prop up the fishing industry that ultimately alters global economics. The result: Millions of Catholics around the world end up eating fish on Fridays as part of a religious observance.

Acute appendicitis generally means a speedy trip to the hospital for surgery. But British researchers say antibiotics might be a safe and effective alternative in uncomplicated cases.

"The general consensus was that the appendix has to be taken out the moment you feel it was inflamed," Dr. Dileep Lobo, professor of gastrointestinal surgery at the University of Nottingham and Queen's Medical Centre, tells Shots.

Earl Albert Moore, who in April 2011 on the 12th anniversary of the Columbine school shootings placed a pipe bomb in a nearby Colorado shopping mall, has been sentenced to life in prison.

Good morning.

Our early headlines:

-- Just 120,000 Jobs Added, But Jobless Rate Dips To 8.2 Percent.

-- Coast Guard Sinks Japanese 'Ghost Ship' Set Adrift By Tsunami.

The Labor Department reported Friday that the nation's unemployment rate inched down to 8.2 percent in March, while only 120,000 jobs were added and Americans stopped looking for work. February's jobless rate was 8.3 percent.

The nation's unemployment rate edged down to 8.2 percent in March from 8.3 percent in February, but only 120,000 jobs were added to private and public payrolls the Bureau of Labor Statistics said this morning in a report that was less positive about the labor market's health than economists had expected.

Prior to the news, forecasters had predicted BLS would say about 200,000 jobs were added to payrolls last month.