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I email. I search. I shop. I Facebook. I stream. I Skype. Every year I seem to do these things a little bit more. Stroke by stroke, as I slip deeper into the Internet's embrace, I find myself wondering:

"What would happen if the Internet went away?"

Can it? It was famously built to be indestructible, with no center, no hub, no "off" or "on" switch. It is, after all, a creature of the U.S. Defense Department, designed, supposedly, to survive a global war.

In his national security speech Thursday, President Obama discussed drone warfare and the Guantanamo detention camp. But a third controversial issue went largely unmentioned: the use of interrogation methods that are tantamount to torture.

Will teaching English in France's universities undermine the French language? That's up for debate in the country now, and the arguments are heated.

The lower house of the French Parliament approved a measure Thursday that would allow courses to be taught in English, something that is currently against the law.

Those in favor of the proposal say it will attract more international students and improve English language skills of French students. But opponents say the move will only impoverish and marginalize the country's tongue.

Two men were arrested and removed from a Pakistan International Airlines passenger jet Friday. It had been on its way from Lahore, Pakistan, to Manchester, England, when something that happened aboard led authorities to scramble Royal Air Force fighter jets and divert the passenger plane to London Stansted Airport.

Irish banking officials should have known there were problems with the controversial 10-euro coin commemorating James Joyce, according to Ireland's RTE News. The coin misquotes the author's Ulysses, and bears an image of Joyce that his estate did not approve.

A longer version of this interview was originally broadcast on June 28, 2012.

Marcus Samuelsson owns two restaurants in New York City and two restaurants in Sweden. He's cooked for President Obama and prime ministers, served as a judge on Top Chef and Chopped, and recently competed against 21 other chefs on Top Chef Masters. (He won.) He's the youngest chef ever to receive two three-star ratings from The New York Times.

This interview was originally broadcast in 1998.

The mythology surrounding The Doors has centered largely on its lead singer, Jim Morrison, who died under mysterious circumstances in 1971. Morrison is still considered one of rock music's tortured poets and sex gods, but instrumentally, The Doors' distinctive sound was based on Ray Manzarek's keyboard playing. His are the riffs made famous in such songs such as "Riders on the Storm," "Break on Through" and "People Are Strange."

Host Jessica Harris speaks with Mick Mountz, founder of Kiva Systems, a mobile robotics company that automates the warehouse fulfillment process. Kiva robots deliver inventory shelves to stationary human operators who then pick and pack the product.

Harris also speaks with Peter Thiel, co-founder and former CEO of PayPal.

Saying that "those who commit sexual assaults are not only committing a crime, they threaten the trust and discipline that make our military strong," President Obama on Friday urged Naval Academy graduates to help bring an end to a disturbing series of such offenses.

"They've got no place in the greatest military on earth," Obama said during the commencement address he delivered at the academy's Annapolis, Md., campus.

In parts of the southeastern US, aggressive fire ants have been driven out by an even more recent arrival, the tawny crazy ant. Edward LeBrun, a researcher at the University of Texas at Austin, describes the newcomers and how one invasive species can out-invade another.

Populations of frogs, salamanders and other amphibians are declining at an average rate of 3.7 percent each year, according to a U.S. Geological Survey study released this week. Researchers say the study is the first to calculate how quickly amphibians are disappearing in the United States.

"If the rate observed is representative and remains unchanged, these species would disappear from half of the habitats they currently occupy in about 20 years," according to the USGS.

Transcript

FLORA LICHTMAN, HOST:

This is SCIENCE FRIDAY. I'm Flora Lichtman. You've likely heard of the legendary explorers Lewis and Clark, but maybe not of the U.S. Army explorer Stephen Harriman Long, an engineer who led a scientific expedition through the Great Plaines 15 years after Lewis and Clark.

His expedition traveled through Oklahoma, Kansas and Nebraska. And what did his crew make of America's Breadbasket? A place wholly unfit for cultivation or agriculture, they said. On a map, the explorers labeled the Great Plains as the Great American Desert.

Transcript

FLORA LICHTMAN, HOST:

This is SCIENCE FRIDAY. I'm Flora Lichtman, filling in for Ira Flatow today. Last year, researchers reported a breakthrough in treating Alzheimer's disease. They'd found a drug that appeared to reverse the symptoms of Alzheimer's in mice. The drug was already on the market, approved by the FDA to treat a type of skin cancer, meaning Alzheimer's patients could ask their doctors for a prescription, and some did.

Transcript

FLORA LICHTMAN, HOST:

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.

"Some memories come with a very compelling sense of truth about them. And that happens to be the case even with memories that are not true." -- Daniel Kahneman

Memory is malleable, dynamic and elusive. When we tap into our memories, where's the line between fact and fiction? How does our memory play tricks on us, and how can we train it to be more accurate? In this hour, TED speakers discuss how a nimble memory can improve your life, and how a frail one might ruin someone else's.

Part 3 of the TED Radio Hour episode Memory Games.

About Joshua Foer's TEDTalk

Some people can memorize thousands of numbers, the names of dozens of strangers or the precise order of cards in a shuffled deck. Science writer and U.S. Memory Champion Joshua Foer shows how anyone can become a memory virtuoso, including him.

About Joshua Foer

Part 2 of the TED Radio Hour episode Memory Games.

About Daniel Kahneman's TEDTalk

Nobel laureate and founder of behavioral economics Daniel Kahneman goes through a series of examples of things we might remember, from vacations to colonoscopies. He explains how our "experiencing selves" and our "remembering selves" perceive happiness differently.

Part 1 of the TED Radio Hour episode Memory Games.

About Scott Fraser's TEDTalk

Forensic psychologist Scott Fraser studies how we remember crimes. He describes a deadly shooting and explains how eyewitnesses can create memories that they haven't seen. Why? Because the brain is always trying to fill in the blanks.

About Scott Fraser

Lois Lerner, the IRS official who oversees the branch of the agency that targeted conservative groups, has been placed on administrative leave a day after she refused to answer questions in a congressional probe of the scandal.

The Boy Scouts of America has agreed for the first time to allow openly gay boys as members, but a vote of the organization's National Council left in place a ban on gay Scout leaders.

The Associated Press reports that of the local Scout leaders voting at their annual meeting in Texas, more than 60 percent supported the proposal. The policy change approved by the 1,400-member National Council would take effect Jan. 1, 2014, the organization said.

For the first time in seven years, the U.S. Senate has confirmed a judge to sit on the important federal appeals court for the District of Columbia. The Senate unanimously confirmed Deputy Solicitor General Sri Srinivasan on Thursday for the seat previously held by Supreme Court Chief Justice John Roberts.