In a study published in The New England Journal of Medicine, researchers reported an association between daily nut consumption and a reduction in the risk of dying from cancer, heart disease, and other major chronic diseases. Lead author Charles Fuchs discusses these findings.

Retailers have used various techniques to analyze in-store buying behavior, such as surveys, video surveillance, and buyer reward programs. Some stores have been tapping into the technology in smartphones to track shoppers' actions. New York Times reporter Quentin Hardy discusses how they're doing this and what information they can gather.

Upcoming NASA budget cuts may force the agency to choose between two of its flagship planetary missions--the Mars Curiosity rover and the Cassini mission to Saturn. Wired reporter Adam Mann discuss how much it takes to run these missions and what discoveries we could miss out on.

One in every five sunlike stars in the Milky Way may have an Earth-sized planet circling it in the Goldilocks zone--the sweet spot where liquid water could exist. That's according to a new analysis of data from the Kepler spacecraft. Sara Seager, an exoplanet hunter at MIT, talks about what's next in the hunt for Earth 2.0.

PayPal, Chase Quickpay, Venmo: all ways to transfer money quickly to your friends. But none is as simple as sending an e-mail. Enter Square Cash--a new service from the mobile-payments company Square. But should it be this easy? Ellis Hamburger, a reporter at The Verge, debates the pros and cons in this episode of App Chat.

In Falling Upwards, writer Richard Holmes tells the story of early balloon flight--and of the nervy scientists who risked life and limb to take their experiments into the air. Among their discoveries? Insect migration and the stratosphere. Falling Upwards chronicles the balloonists who took science into the stratosphere.

Legend holds that the length of a woolly bear caterpillar's color bands can be used to forecast how severe the winter weather will be. The myth dates back to colonial American folklore but was popularized by a 1948 study. SciFri finds out if there's any truth to the lore, and what the caterpillar's fuzzy bristles are really used for.

This week, India launched Mangalyaan, its first robotic mission to orbit Mars and probe its atmosphere. Only Russia, Europe, and the U.S. have successfully orbited the planet. Joan Johnson-Freese, a professor in national security affairs, and planetary scientist Bruce Jakosky discuss the Indian space program, as well as NASA's upcoming mission to the Martian atmosphere.

Echinacea, vitamins, and other dietary supplements have become a $5 billion industry, but the products don't need to be pre-approved by the FDA before they go on the market. How do we know what is really in our supplements? What regulations are currently in place? How can we keep ourselves safe and informed?

In Einstein and the Quantum: The Quest of the Valiant Swabian, theoretical physicist A. Douglas Stone writes that whereas Einstein is best known for his theory of relativity, his truly revolutionary idea was the development of quantum theory — an idea that escaped many of the age's most brilliant minds.