For a big selection of eco-lingerie, MNN's lifestyle blogger recommends FaeriesDance.com — which stocks many hard-to-find European eco-fashion brands.

New data shows that seniors are more sexually active than ever, leading to a sharp rise in rates of sexually transmitted diseases.

Tips for moms on how, when, and what to talk about when talking to your son about puberty.

Having sex with an ex seems to be a fairly typical part of the breakup process for young adults, a new study shows.

Sex. Many (but not all) animals do it.

From the neurobiology of attraction to the hard truth about online dating, these five books offer fresh takes on our quest for love.

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.

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.

Thanks in part to shows like 'Modern Family,' a majority of Americans are now in favor of same-sex marriage.

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

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

New research concludes that hypersexuality is not a neurological or physiological disorder, but just heightened libido.

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

Keeping sperm from being ejaculated may provide the key to creating a birth control drug for men.

Unlike many humans, some monkeys are genuinely faithful to their mates.

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

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

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

Study found that men who ejaculated more than 21 times a month were significantly less likely to develop prostate cancer.

A newly discovered mechanism in the throats of mice works like a supersonic jet engine.

Moorland hawker dragonfly demonstrates the lengths women must go to avoid the opposite sex.

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

A star from a distant galaxy produced the most intense X-ray blast ever.

Through November, customers can redeem specially marked bottles of Finlandia vodka to donate a tree planting in honor of themselves, friends or family through T

New evidence suggests that deforestation and increased carbon dioxide in the atmosphere are creating a meaner poison ivy.

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

Video captured by salmon farmers shows a bald eagle grabbed by an octopus — and then the farmers stepped in.

Video: Larry Schweiger, president and chief executive Officer of the National Wildlife Federation, talks with Rachel Maddow about the extent of damage to Gulf c

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

Something seems fishy ... when asked about poor response to the disaster, the head of the Louisiana Coast Guard said: 'I'm just slow and dumb.'

Video: The celebrity talks about his experience in the industry and how to move forward.

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

The oil spill drives home the consequences of our addiction.

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.

100,000 barrels per day and a tilting wellhead presage doomsday scenario, according to an industry insider.

Oilman-turned-solar entrepreneur Jeremy Leggett says there's only one shot to plug the well, and getting it wrong comes with a heavy price.

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.

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

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

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

Brian Schweitzer makes headlines for discussing how we use our military to protect our energy interests abroad.

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.

There's a lot to sort out in Libya's post-Gadhafi era, but there should be good news for the American consumer.

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-

It's just not possible to feed meat to the 7 billion (and growing) people on planet Earth.

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

The USDA has updated its planting-zones map for the first time in 22 years, reflecting a warmer U.S. where many southern crops are expanding north.

The fast-food company denies that pressure from chef Jamie Oliver had anything to do with its decision.

Schools don’t have to discard textbooks with the old food pyramid in them. They can supplement what they have with free material about MyPlate from the USDA.

Officials will offer money to owners of environmentally sensitive farmland if they idle it in a conservation program instead of growing crops.