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Graduate student Clement Cid sits atop the solar-powered toilet he helped to build at the California Institute of Technology in Pasadena, Calif. Underneath the platform, the toilet converts waste into fertilizer. The Caltech team will use fake feces to demonstrate the toilet's features next week at the Bill & Melinda Gates Foundation offices.

Why Is The World's Largest Foundation Buying Fake Poop?

The Gates Foundation has granted engineers more than $3 million to develop cheap, high-tech toilets that don't need water or electricity. To test these supercommodes, the foundation has purchased 50 pounds of soybean paste that resembles human waste.

Republican presidential candidate Rick Perry walks with former Marine officer Dan Moran during a campaign stop Wednesday in Council Bluffs, Iowa.

Perry Tries To Ride Back Into Iowans' Hearts

Texas Gov. Rick Perry entered the GOP presidential race with great fanfare and immediately became a front-runner. But his candidacy quickly deflated. Now, Perry is trying to mount a comeback in Iowa, appealing to social conservatives with provocative ads and embarking on a bus tour of the state.

Severe Storms Leave Nine Dead In Midwest

Several people are dead in southern Illinois and Missouri after storms swept through the area. Kansas was also hit hard.

Polls show Rick Santorum and Mitt Romney in a tight race heading into Tuesday's Michigan primary. Santorum's campaign signs are stuck in the snow before his campaign stop at the The Colonial Valley Suites on Feb. 26 in Davison, Mich.

Santorum Could Lose Michigan Vote But Still Gain Delegates

Michigan's demographics and recent polling suggest there is a real possibility that Rick Santorum and Mitt Romney will each get 15 of the state's 30 delegates.

Filling semlor with sweet almond paste requires great concentration from Astrid Foster, age 7. Get the recipe for <a href="http://www.npr.org/2012/02/16/146985466/swedish-fat-tuesday-delicacy-kept-alive-in-portland#147040528">semlor</a>.

Swedish Fat Tuesday Delicacy Kept Alive In Portland

Back when refrigeration wasn't up to modern standards, Fat Tuesday was a time to clear the house of rich, indulgent foods. A Swedish church in Portland, Ore., keeps the Swedish version of the baking tradition alive, if not the religious observance.

In 2002, state lawmakers in Massachusetts approved legislation requiring most employers to provide contraceptive coverage to their employees. One of the groups pushing for the law was the Coalition for Choice, led by Melissa Kogut (center).

Rules Requiring Contraceptive Coverage Have Been In Force For Years

Many employer health plans have effectively been required to cover prescription birth control since 2000. And more than half the states have similar rules.

<p>The National Audubon Society considers fall leaves to be "natural vitamins" to use in yards. </p>

Want To Improve Your Lawn? Don't Bag Those Leaves

From compost to mulch, fall leaves can be used to improve the health and ecological diversity of lawns. The National Audubon Society's Melissa Hopkins, who calls the leaves "free vitamins," has some tips on how to make the most of them.

A judge smells a block of cheese at the World Championship Cheese Contest in Madison, Wis. Judges carefully appraise a cheese's look, smell and texture before they taste it and spit it out.

Hundreds Battle For International Cheese Glory In Wisconsin

This year's World Championship Cheese Contest received a record 2,503 entries from 24 countries. Traditional heavyweights in the U.S. and France were well-represented, making it tough for first-time competitors from India, Estonia, Romania and Croatia to catch the judges' attention.

Baseball's 10th player: you, on your couch, willing a win.

For Baseball Fans, May The Force Be With You

What if Darth Vader was controlling not just the Death Star, but also the Yankees? Commentator Hart Seely thinks he, like Luke's father, can influence plays on the field from afar. How do you affect your team from your couch? Tell us your secret baseball-watching rituals in the comments.

President Obama at a stop on his bus tour of Ohio in Port Clinton on July 5.

Swing State TV Stations Spiking Ad Rates As Campaign Cash Pours In

Someone once said that owning a TV station is a license to print money. Now, that was before the advent of cable TV and computer screens and streaming video. But these are clearly good times for some stations, especially the ones in presidential battleground states.

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