Dec 6, 2013 — Officials in China's commercial capital ordered schoolchildren to stay indoors, construction to halt and even delayed flights because of the city's highest-ever pollution levels.
Dec 6, 2013 — The only person known to have been cured of AIDS got a bone marrow transplant, so when two AIDS patients in Boston appeared to be free of the virus after transplants, scientists hoped they were cured, too. But the HIV virus has returned in both.
Dec 6, 2013 — This week China launched its Chang'e-3 lunar lander, with the Jade Rabbit moon rover on board. BBC science editor David Shukman, who got a behind-the-scenes glimpse of China's secretive space program during a recent trip there, talks about the motivations behind the country's moonshot.
Dec 6, 2013 — For 25 seasons, The Simpsons writers have been smuggling math onto Americans' TV screens. Author Simon Singh helps Ira decode the show's numberplay, while former Simpsons writer David X. Cohen remembers how he helped Homer solve Fermat's Last Theorem (sort of).
Dec 6, 2013 — In 2008, Congress passed a law requiring most rail networks to install "positive train control" collision technology by 2015. Engineering professor Christopher Barkan discusses train safety systems, how "positive train control" might prevent accidents, and whether railroads will be able to meet the deadline.
Dec 6, 2013 — Drawing from research presented at this year's Acoustical Society of America conference, psycholinguist Stefanie Shattuck-Hufnagel untangles tongue twisters to look at speech planning patterns, and professor Amalia Arvaniti discusses the "Valley Girl" dialect.
Dec 6, 2013 — In "Bitter Pill: Why Medical Bills Are Killing Us," a 26,000-word investigative piece in TIME magazine, journalist and entrepreneur Steven Brill catalogues the myriad reasons for America's skyrocketing healthcare costs, from extravagantly paid administrators at nonprofit hospitals to bloated bills for hospital care. And Obamacare, he argues, won't do much to solve the problem.
Dec 6, 2013 — When bees disappeared from central China years ago, Chinese apple farmers had to pollinate by hand. Embarrassing — people doing bees' work, but then came the big discovery — a surprise that still haunts the conservation movement. What if people outperform bees?
Dec 6, 2013 — Technology now allows us to "hack" solutions to the biggest challenges of our time. But how far is too far? This hour, we hear from TED speakers who dare to hack the brain, the climate, and even the animal kingdom in hopes of creating a better world.
Dec 6, 2013 — The world wants Syria's chemical arsenal destroyed. But so far, no country has offered to do the dirty work on its soil. Over the past week, an alternative has gained ground: Carry out the destruction at sea. The plan taking shape is complicated and untested, but it just might work.