Talk of the Nation

North Carolina State University biologist Rob Dunn and colleagues surveyed people's pillow cases, refrigerators, toilet seats, TV screens and other household spots, to learn about the microbes that dwell in our homes. Among the findings, reported in the journal PLoS One, homes with dogs had more diverse bacterial communities, and higher numbers of "dog-associated" bacteria.

Smartphones, tablets and computers could help seniors stay connected to their communities and families. But a hefty price tag, steep learning curves, and designs meant for younger eyes and hands could keep some older adults from logging on. Guests discuss the best ways for seniors to tackle new technology, and how devices can be adapted to accommodate older users.

Writings from childhood — cards, stories and other notes — can hide for decades, like time capsules tucked away in boxes, old bedrooms, attics and journals. Writer Jim Sollisch talks about how old thank you notes from his youth foreshadowed his adult life.

Beijing continues to pressure its neighbors over strings of disputed areas in the South China Sea that reportedly hold massive deposits of oil and gas. The ongoing disputes raise serious questions about China's goals in the region and how the United States should address escalating tensions.

In a speech at the National Defense University, President Barack Obama addresses the use of U.S. drones to target terrorists — including U.S. citizens — and his renewed efforts to close the military prison at Guantanamo Bay.

You've probably seen it in your inbox before: Someone who claims to have come into a fortune needs your help. You can share in the profits — if you send along a deposit or your bank account number. Boston Globe correspondent Finn Brunton talks about the history of the "Nigerian prince" or "419" scam, which actually got its start long before email.

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NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan.

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NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan, in Washington. Immigration reform heads to the Senate floor, ex-congressman Weiner guns for Gracie Mansion, and Senator Inhofe on the distinction between disaster aid for a superstorm and tornados. It's Wednesday, and time for a...

SENATOR JAMES INHOFE: Totally different...

CONAN: ...edition of the Political Junkie.

(SOUNDBITE OF ARCHIVED RECORDINGS)

PRESIDENT RONALD REAGAN: There you go again.

Monday's tornado tore through parts of Oklahoma City at 200 miles per hour and killed at least 24 people. Many more are missing orinjured. Guest host Jennifer Ludden talks to KOSU reporter Michael Cross and to meteorologist Paul Douglas about why it's so hard to track tornadoes.

Apple CEO Timothy Cook made a rare appearance on Capitol Hill on Tuesday, testifying after congressional investigators revealed that Apple avoided billions in taxes. Reporter Charles Duhigg of The New York Times and guest host Jennifer Ludden talk about how, as Duhigg writes, "technology giants have taken advantage of tax codes written for an industrial age."

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JENNIFER LUDDEN, HOST:

This is TALK OF THE NATION. I'm Jennifer Ludden in Washington. Neal Conan is away. It's graduation season, and that means 20-somethings and parents sitting through long commencement ceremonies while the older and wiser give advice. Here's comedian Stephen Colbert speaking at the University of Virginia.

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JENNIFER LUDDEN, HOST:

Last week, the National Transportation Safety Board recommended lowering the blood alcohol content threshold for drunken driving from .08 to .05. The NTSB argues this could save millions of lives each year, but critics beg to differ. Some say lack of enforcement is the problem. Others point to our casual attitude about drinking and driving. Meanwhile, lowering the threshold could have implications for law enforcement, bartenders, maybe your dinner party.

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JENNIFER LUDDEN, HOST:

This is TALK OF THE NATION. I'm Jennifer Ludden, in Washington. Population in America's big cities is surging, and more people are choosing to live alone. But where? As the demand for housing rises, some renters are opting to downsize their belongings and move to smaller spaces - much smaller. Imagine a single room no larger than many American closets and a community kitchen shared with multiple residents.

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JENNIFER LUDDEN, HOST:

This is TALK OF THE NATION. I'm Jennifer Ludden in Washington. Neal Conan is away. Non-unionized fast food workers walked off the job in Milwaukee last week, demanding, among other things, a raise to $15 an hour. Their actions follow those of workers in four other cities this spring, part of what some are calling the new face of the labor movement, that is collective action outside of traditional union membership.

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JENNIFER LUDDEN, HOST:

Generations of physicists have claimed that time is an illusion. But not all agree. In his book Time Reborn: From the Crisis in Physics to the Future of the Universe, theoretical physicist Lee Smolin argues that time exists--and he says time is key to understanding the evolution of the universe.

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IRA FLATOW, HOST:

This is SCIENCE FRIDAY, I'm Ira Flatow. This week, scientists at the Oregon Health and Science University, OHSU, announced a breakthrough in cloning of a human embryo. They took adult cells, put the cells into specially prepared human eggs and created genetically identical embryos. It's something lots of stem cell researchers have been trying to do for years without success.

A report from the UN Food and Agriculture Organization says insects offer a huge potential for improving the world's food security. Peter Menzel, co-author of Man Eating Bugs, describes some insect-based cuisine and the western aversion to creepy-crawly snacks.

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NEAL CONAN, HOST:

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NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. Thirty million dollars is a lot of money, but how do you divide it among the families of the three people killed, the dozens maimed, the hundreds who spent time in the hospital, the thousands who witnessed the blasts at the finish line of the Boston Marathon last month?

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NEAL CONAN, HOST:

As the death toll in Syria climbed over the past two years, many critics charge that President Obama has not done enough to aid the opposition. In an op-ed in today's New York Times, former Ambassador Christopher Hill argues that the administration has made a serious mistake, but, quote, "The real shortcoming of the administration's policy on Syria has not been an unwillingness to engage militarily, but the ill-advised decision in August 2011 to preclude the possibility of a diplomatic resolution involving all sides."

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NEAL CONAN, HOST:

Every 14 minutes, someone in this country commits suicide, and research on ways to reduce that grim statistic appears to be on a plateau. In other words, psychologists don't have much in the way of new ideas - at least, right now - except maybe for what's described as groundbreaking work on the notes that those who kill themselves sometimes leave behind. A team of researchers at the Cincinnati Children's Hospital use computers to break down the language in these messages of despair, in the hope that they can better identify those at risk.

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NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. Today as part of our Looking Ahead series, we'll talk with writer Chris Hedges, former New York Times foreign correspondent and old friend and colleague who's joined us many times over the years, going back to what's probably still his best known book, "War Is a Force That Gives Us Meaning."

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NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan.

NPR's Neal Conan reads from listener comments on previous show topics, including postcards from New Orleans and our talk with astronaut Buzz Aldrin.