On March 21, the American Academy of Pediatrics announced its support for gay marriage, as well as foster care and adoption rights for same-sex couples.

A federal judge has ordered the Food and Drug Administration to make the morning-after pill available to teens without a prescription.

But rolling in the hay resumes as doctors treat her allergy to semen.

Women who have had heart attacks want more information than they're currently getting from their cardiologists in order to move on with their lives.

Male primates may have become monogamous to protect their offspring from being killed by rival males.

Videos and ads by Roxy for women's surfing gear and swimsuits anger female surfers.

Confirming a bit of conventional wisdom, a new study finds that people who fear being single often settle for less in love.

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

Most middle-aged women do not give up sex as they age, especially if sex is important to them.

The popularity of weird beards and mustaches among young men living in Brooklyn, N.Y., may be more than just a hipster fad.

Men have lost most of the genes originally included on the Y chromosome during evolution, but those genes essential for survival have persevered.

More than two-thirds of healthy Americans have a human papillomavirus (HPV) infection on some part of their body

"Sex in the Wild" is an entertaining, educational, explicit and scientifically stimulating look at how animals reproduce.

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

Though the study's assumption of what "better" sex means is pretty specific.

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

Picking a partner while on the Pill might have lasting ramifications on marital satisfaction, new research finds.

If you're looking for a boost in happiness, having more sex may not be your best bet.

Two chubby marsupial species that would literally die for sex (albeit 14-hour sessions) have been discovered in Australia.

Women's cheeks get redder when they are the most fertile, but this color change is so subtle that it is undetectable by the human eye.

Rise of the robosexuals: What will it mean for our human relationships?

From the researcher who discovered peacock spiders, a new Australian spider species engages in a complex game to determine if a potential mate is a virgin.

New Zealand's budget will make well-being and equality priorities over the economy.

A binary star system that got too close to our resident supermassive black hole paid the ultimate price.

Drone video shows the beautiful fall foliage on display in Vermont.

A giant whale swam beneath a group of California surfers and it was captured on drone video.

A giant spoon worm was caught on video as it burrows beneath the sea.

Researchers discover several new species of sharks that can walk along shallow reefs on their fins.

Video: MSNBC's Dylan Ratigan talks with T. Boone Pickens, CEO of BP Capital Management, and Erich Pica of the group Friends of the Earth to discuss whether Pres

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.

Planet 100 investigates the 5 worst oil spills on record and how the Gulf oil spill compares.

Eco-publisher giving away copies of Riki Ott's book on the Exxon Valdez spill, <i>Not One Drop</i>, in exchange for donations to help in the Gulf coast relief e

Louisiana Gov. Jindal puts up Flickr album of gruesome oil creeping into Louisiana wetlands.

A new app for iPhone and Android lets users report impacts of the Gulf oil spill in real time.

BP is coming under criticism for buying 'gulf oil spill' search advertising on Google. Will the company's attempt to redirect online traffic backfire?

Alaskan journalist Charles Wohlforth, author of 'The Fate of Nature,' tells MSNBC about the oil spill's likely long-term effects and what could exacerbate them.

The makers of eco-docu 'FUEL' wants you to attend two big events to help end America's addiction to fossil fuels.

But like those civilizations that have disappeared mysteriously, ours seems headed in the same direction —disaster.

ClimateCulture launches a campaign asking individuals to do their part in reducing the need for oil. Not sure this one will go over well in middle America.

Billed as the first charity 'F-bomb-athon' this is of the most satisfying rants about the BP oil spill yet. Do not listen in the presence of small children.

The answer, it turns out, is simple: BP didn't want workers to be disturbed by "false alarms."

Environmentalists are pledging to go oil free August 21 and 22. Are you up to the challenge?

Don't miss your chance to make a difference during the Weekend Without Oil.

MNN family blogger's attempt to live without oil while embarking on a family vacation.

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

Several environmental organizations join forces to launch a new campaign urging the federal government to adopt a fuel efficiency goal of 60mpg by 2025.

Global clock tallies environmental and energy impacts, and poses some frightening stats.

A mere change of governments will not make Arab countries’ economic problems go away. Indeed, the converging effects of population growth, climate change, and

No matter how much nostalgia they generate, they're out of step with $4 a gallon gas and concern about foreign oil dependence.

A new proposal would expand offshore drilling in U.S. waters, but it's drawing fire from supporters as well as critics of the oil and gas industry.