Science & Environment

The characteristics of gun violence in the U.S. are largely unknown because key federal health agencies have been banned from conducting such research since the mid-1990s.

President Obama, however, wants to change that.

Soup comes in many variations — chicken noodle, creamy tomato, potato and leek, to name a few. But through much of human history, soup was much simpler, requiring nothing more than boiling a haunch of meat or other chunk of food in water to create a warm, nourishing broth.

So who concocted that first bowl of soup?

Have you ever spent a couple of hours working on a craft project — or a presentation for work — and then fallen in love with what you've accomplished? Do the colors you've picked for your PowerPoint background pop so beautifully that you just have to sit back and admire your own genius?

If so, get in line: You're the latest person to fall victim to the Ikea Effect.

Guys, it may be time to get off the couch and hit the treadmill — especially if you want to have kids.

Okay, we all know that exercise is good for us. It can reduce the risk of obesity, diabetes and heart disease, to name a few benefits. Now researchers say physical activity may also help keep sperm healthy and happy.

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RENEE MONTAGNE, HOST:

President Obama delivers his State of Union address a week from today. That speech is expected to expand on proposals the president put forth at his inauguration. One surprise in his inaugural address was a call to do more on climate change - that after a campaign that mostly ignored concerns about the environment. NPR's Ari Shapiro looks at what environmental groups are expecting now.

ARI SHAPIRO, BYLINE: President Obama's inaugural address spent a full eight sentences on climate, more than any other subject.

There's a lot of talk in politics about the desirability of American manufacturing and "green" jobs. President Obama talks about both often, especially wind turbines and long-lasting batteries that are made on U.S. soil.

Robert Siegel, host of All Things Considered, recently visited a Massachusetts factory that makes a product that hits those same parameters. It's arguably a force for sustainability, nearly 40 Americans assemble it, and it's an interesting case study in innovation: the high-speed hand dryer.

'We Had A Product People Hated To Use'