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Opinion, arguments & analyses from guest experts and from the editors of Scientific American

Nano-Powder on Your Doughnuts: Should You Worry?

There are nano-sized particles in your food. Does this make you nervous?A new report from an environmental health group, As You Sow, raises concern about nanoparticles in some popular sweets...

February 6, 2013 — David Biello

The New Way to Look for Mars Life: Follow the Salt

LOS ANGELES—There is probably water on Mars, but you wouldn't want to drink it. It's salty, viscous and quite possibly toxic. But astrobiologists are nonetheless excited about the possibility.Just in the past few years, orbiter cameras and Mars landers have gathered evidence that watery liquid does exist on the Red Planet, at least during some part of the day or some part of the year...

February 6, 2013 — John Matson

Is Nuclear Power Doomed to Dwindle?

The nuclear reactor near Crystal River north of Tampa Bay will never fission again. Duke Energy has decided to shutter the troubled nuclear power plant, which has been shut down since 2009 thanks to a crack in the dome that shields the reactor...

February 5, 2013 — David Biello

Sorry, the Government Is Not Creating Free Nationwide Wi-Fi Networks

You would be forgiven for thinking that the U.S. government just announced a plan to build a free public Wi-Fi system. After the Washington Post ran a front-page story on Monday morning that began “The federal government wants to create super WiFi networks across the nation, so powerful and broad in reach that consumers could use them to make calls or surf the Internet without paying a cellphone bill every month,” others picked up on the incredible story...

February 5, 2013 — Michael Moyer

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