At the North American International Auto Show in Detroit this week, it's not all hybrids and battery-powered cars. Some car companies are making significant investments in a fuel that's not new at all — diesel.
The newest diesel engines are far cleaner than their predecessors, and they get many more miles per gallon. The question is, what's holding customers back from switching gas pumps?
When you look around the auto show, there's a lot of energy and there's a lot of money being spent again. The one topic that keeps coming up, of course, is fuel economy.
Like other animals and many living things, we humans grow when we're young and then stop growing once we mature. But trees, it turns out, are an exception to this general rule. In fact, scientists have discovered that trees grow faster the older they get.
Once trees reach a certain height, they do stop getting taller. So many foresters figured that tree growth — and girth — also slowed with age.
Florida may soon become the latest state to allow doctors to prescribe marijuana. Advocates there are gathering signatures to put a medical marijuana referendum on the fall ballot.
But Florida's Legislature may act sooner to allow residents access to a particular type of marijuana. Advocates say the strain called Charlotte's Web offers hope to children with severe seizure disorders.
When you meet bobsled driver Steve Holcomb, he doesn't talk about his Olympic gold medal — the one he won with the four-man team at the Vancouver Olympics in 2010. Instead, he talks about the one that got away.
Four years ago, his two-man bobsled started the Olympic run with a great push. "I was actually winning the race in Vancouver," Holcomb says. But then he "made a driving mistake, and we went from first place to sixth place in two turns."
Thedocumentary Blackfish made a splash at the Sundance Film Festival when it premiered last January, and got more attention when it was released in theaters over the summer. But it didn't reach its largest audience until October, when millions watched it on CNN.
It's a powerful documentary that focuses on Tilikum, the male orca who pulled trainer Dawn Brancheau into the water and killed her at SeaWorld Orlando in 2010. In telling the story, Blackfish relies heavily on interviews with former SeaWorld trainers like Samantha Berg.
Former California official Maria Contreras-Sweet is President Obama's pick to lead the Small Business Administration. She was introduced and her official nomination announced at a White House event Thursday.
Born in Mexico, Contreras-Sweet became the first Latina to serve as a cabinet secretary in California when she led its Business, Transportation and Housing Agency from 1999-2003.
OK, it's a huge question. And maybe not one generally applied to television. But the metrics of success determine whether a television show lives or dies. (If this is the sort of topic that seems frivolous, consider the billions of dollars TV and other copyright industries contribute to the U.S. economy. The stakes start feeling higher.)
So that's one question. And here's another that we're sure has been bothering many of you for years. What happens when you give a bird a guitar? Well, you'll get your answer at a new exhibition opening Saturday at the Peabody Essex Museum in Salem, Massachusetts. It's called "From Here to Ear."
AUDIE CORNISH, HOST:
Picture this: One room, 70 zebra finches, 14 tuned and amplified guitars, no fingers.