As the Supreme Court prepares to hear arguments in two gay marriage cases, it's easy to forget how far opinions have moved on the issue.

Research suggests that long-distance relationships encourage more communication and that couples try harder.

Feeling happy? Go ahead and smile — but know that you may be telling others more about yourself than you think.

Even water tastes sweeter when you're in love, new research finds.

Although syphilis was nearly eliminated from the U.S. about a decade ago, the sexually transmitted disease has resurged in recent years.

Early data suggest the U.S. teen birth rate hit a historic low in 2013, according to a new report from the CDC.

Male chimpanzees that wage a campaign of sustained aggression against females sire more offspring than their less violent counterparts.

Video shows a motorcyclist in Belgium stopping to rescue a kitten from the road.

The demand for gasoline in the United States reached a new high in March with an average of 9.3 million barrels of gasoline being produced per day.

BP’s oil spill could hamper the domestic oil industry -- but that doesn’t mean we’ll use less oil.

The oil spill drives home the consequences of our addiction.

Greenpeace ship blocked en route to protesting new oil find off the coast of Greenland.

Are gas prices making you want to pull your hair out? CNN's Ali Velshi explains why we're to blame for high gas prices.

No, a state senator cannot single-handedly take down Big Oil. That only happens in Frank Capra movies. In real life, the petroleum giants always get their way.

The cartoonist responsible for beloved webcomic xkcd is also an ace infographic designer. His "Money Chart" is the definitive portrait of a cash-strapped, cash-

Thanks to our oil addiction, such a world would include rolling blackouts, minimal transportation, dwindling food supplies and possibly war.

Kermit pops into ‘Saturday Night Live’ to discuss the school lunch standards.

The USDA has released its new, healthier standards for school lunches. Is everyone optomistic?

Sensational headlines and varying reports about a North Carolina school lunch incident would have us think so.

America does not grow enough fruits and vegetables to satisfy USDA recommendations for all citizens. This infograhic makes the argument easy to understand.

“Inconvenient Truth” producer Laurie David teams up with Katie Couric to make a film that has the Grocery Manufacturers Association defending its efforts.

New dietary guidelines put a limit on added sugar, and changed their tune on dietary cholesterol. Good news for egg lovers.

The new USDA label for "bioengineered food" doesn't answer basic questions that some shoppers will have about genetically modified foods.

Arctic sea ice — the ice that freezes and floats on Arctic waters — is thinning at a steadier and faster rate than researchers previously thought.

Eko Atlantic will be the modern face of Nigeria, for better or for worse.

From N.H. to Nova Scotia, Ancient forests emerge only during rare periods of extreme low tide.

Climate Chronograph is a memorial that sinks as sea levels rise.

Geologists say they have found a range of volcanoes beneath the ice of Antarctica that rival those of east Africa and North America.

Egmont Key National Wildlife Refuge is rich with wildlife and history — and it's under siege from the waters that surround it. And it's only to get worse.

Here are some fun reads for budding environmentalists.

Vegan actress and celebrated animal activist says she's expecting later this year.

Raising a child in a mentally stimulating environment has been linked to developing a smaller brain cortex, which in turn is linked to higher IQ.

Buckingham Palace finally puts the pregnancy rumors to rest by officially announcing that the Duke and Duchess of Cambridge are expecting.

Make sure your new baby's room is safe and healthy for the whole family with these quick and easy tips.

Check out this recipe for a chocolate chip cookie loaded with the perfect supply of nutrients for breastfeeding moms.

There are some things you can do to ease the adjustment your older kids experience from having a new sibling, including involving them in the baby's arrival.

New study says pregnant women should think twice about taking acetaminophen as it may cause behavioral issues later on. But read deeper and the story changes.

Secondhand items are great for your baby and the planet, but only if they're safe.

Explaining this his car 'doesn't need its own little home,' a homeowner converts his garage into a cottage and rents out his main house.

Apartments are expensive and hard to find. Is co-living a solution or is it just an upscale rooming house?

The 17th century New Jersey abode comes with a gazebo, 4-car garage and a couple named Harry and Doris.

Actor teams with Google and the United Nations to collect real-time satellite imagery of war-torn Sudan region.

Here's a small birthday tribute to Mohandas Karamchand Gandhi, the "great-souled" man who was born 148 years ago today. It's a poignant way to celebrate the man

Health experts argue that banning the preservative could make it difficult for children in developing countries to get life-saving vaccines.

The IPCC report is expected to include summaries on melting glaciers, sea level rise and the impact of human activities on the global climate.

Health ratings on packages could influence consumers' purchasing decisions and drive food companies to make healthier products.

Clever website factors in diet goals, body type and food preferences to create a weekly meal plan that makes sense.

How healthy is that egg? Lots of factors are involved, but the color of the egg shell isn't one of them.

Fiber is essential to a healthy digestive system. Find a place for these high fiber foods throughout your day and you'll get plenty.

Astrophotographer Andrew McCarthy spent hours creating this breathtakingly detailed composite image of our moon.