Seven solar companies have filed a trade complaint with the federal government, accusing China of dumping artificially cheap solar panels on the US market. But solar installers welcome the low prices. Ira Flatow and guests discuss what's best for the domestic solar industry--and US jobs--in the long run.

For years, a theory has held that Earth's large moon played a critical role in stabilizing the planet's tilt, damping down differences between the seasons. Now, astronomer Jason Barnes says that life on our planet would endure even without a moon, a finding that might increase the number of potentially habitable planets in our galaxy.

Citing "capital scarcity" the Geron Corporation said it will abandon its research into using human embryonic stem cells to treat spinal cord injuries. Stem cell expert Leonard Zon discusses the announcement and what it means for the future of embryonic stem cell research.

Toilets, as most of us know them, haven't changed much since the 1800s--they use a lot of water, and require an infrastructure that many communities can't afford. Ira Flatow and guests look at the problem of access to sanitation, and how engineers are making toilets better.

With the Macy's Thanksgiving Day Parade less than a week away, it's crunch time for the balloon technicians. Science Friday goes behind the scenes at Macy's design studio to find out about the final preparations for the parade.

Reporting in Proceedings of the National Academy of Sciences, researchers write that complete strangers are capable of spotting individuals with a genetic predisposition to empathy and sociable behavior. Author Sarina Saturn discusses the study, and how sociability has evolved across cultures.

Food and Drug Administration Commissioner Margaret Hamburg has spoken.

After more than a year of deliberations and an unprecedented public hearing in June, the agency has revoked approval of the biotech blockbuster Avastin, a medicine that chokes off the blood supply to various cancer cells, as a treatment for metastatic breast cancer.

"Detroit Mayor Dave Bing, who outlined an emergency plan two days ago, isn't wasting any time taking action" in tackling his city's financial crisis, our colleague Micki Maynard at the Changing Gears project reports. "Today, Bing said the city will lay off 1,000 employees, or about 9 percent of the city's payroll, by Feb. 25."

"It is virtually certain that on a global scale hot days [will] become even hotter and occur more often" in coming decades, according to a report released today from a group of more than 100 scientists convened by the United Nations.