Now, tomorrow President Obama delivers his State of the Union address, and may well discuss energy, as he did four years ago. But energy analyst Sarah Ladislaw says a daunting goal is getting trickier.
SARAH LADISLAW: This administration did not come in with small plans for energy markets or for energy policy. Their big plan was to try and de-carbonize the energy sector.
INSKEEP: Reduce carbon emissions by relying less on coal, oil and gas.
LADISLAW: Primarily done for the purpose of battling climate change.
Every few million years or so, the Earth burps up a gargantuan volcano.
These aren't like volcanoes in our lifetimes; these "super volcanoes" can erupt continuously for thousands of years. While they might be rare, you'd best look out when one hits.
The ash and volcanic gases from these volcanoes can wipe out most living things over large parts of the planet. Michael Thorne, a seismologist at the University of Utah, has some clues about what causes these big eruptions.
It sounds like a horror story: Every few years, usually in the winter months, residents of the town of Leesburg, Va., come home from work to find their backyards overrun with turkey vultures. Not just a few birds, but hundreds of them. Everywhere.
Lt. Jeff Dube is with the town's police department. For a whole week, he spent every evening driving around town, looking for the latest vulture hotspots.
"They like Leesburg. There's really no rhyme or reason. Every three to five years they come back en mass, like this year, 2- to 300," Dube says.
Drop a cat and it will swing its head to a horizontal, rearrange its rear, arch its back, splay its legs, and — amazingly often — land on its feet.
This is what cats do. They're famous for it. But now they have a rival.
This is an aphid.
Aphids spend their days sucking sap from leaves. Those leaves can be high off the ground. "High" of course, being a relative term, but think of it this way: Five feet high up is 381 aphids tall. Which is why things get so dicey when a ladybug comes by.
This is SCIENCE FRIDAY. I'm Joe Palca, sitting in for Ira Flatow. If you add it up, we spend a lot of time sleeping, about a third of our lives, actually, and it turns out our bodies don't just power down as we slumber. Research is showing that sleep plays an important role in how our brains process and store the information that we learn throughout the day.
You know the theory that a big collision, a comet or an asteroid, something like that, helped kill off the dinosaurs? The idea has been around for a while. But this week, new research published in journal Science provides more accurate dates for the giant impact and the dino demise.
This is SCIENCE FRIDAY; I'm Joe Palca. Do you ever get the feeling you're being watched? These days if you're not careful, your phone knows where you are, and there's a good chance somebody else does, too. Or you've noticed that the ads on sites you visit are starting to look a little too personalized, like how did they know I was planning a vacation to New Orleans.