Relationships are about how humans relate to one another. Learn more topics like love, marriage, genealogy, dating and divorce.

Much to the shock of kids everywhere, moms are people too! Take this quiz to test your knowledge of all types of mothers, from record-holders to renowned to notorious.

So, you've got 5,000 Facebook friends? Maybe, but not really. There's a quantifiable number of relationships people can successfully maintain, according to evolutionary anthropologist Robin Dunbar.

Been together for years and assume you are common-law married? Better check the law in your state.

Is your heart broken? There is a place that will house its souvenirs.

Matchmakers have paired up couples for centuries, and it doesn't seem as though laxer social rules and online dating has slackened their market. From traditional shadchans to professional Cupids, what does the modern matchmaker do?

Dating isn't always easy. Fortunately, we've got apps that make finding partners with peculiar interests a breeze.

Yep, a new study is reporting that the maximum number of social connections you may ever have could be at the ripe old age of 25. After that, it's just you and Netflix.

Is there a better way to predict the success of marriage? Researchers mapped how couples interact and make decisions about their long-term relationship goals.

A New York lawyer divorced his wife a few months after marriage without her knowing. They lived together a further 20 years. Don't try this at home.

It's kinda tricky, but when you combine positive body image with significant public selfie sharing, it can create a feedback loop with implications for relationships.

You may have jokingly told a friend you'll marry them if neither of you is attached at age 30 or 40. Now a new app will allow you to put it in a contract.

"Happy New Year! Now let's get divorced." The arrival of a new calendar year is expected to bring a jump in divorces, and one UK firm looked into the reasons why.

The special connection shared between hetero women and gay men is the stuff of friendship legend. But what's the actual reason that these BFFs are so good together?

Here are some of the wildest apps, studies and best relationship news we came across in 2015.

Are long-distance relationships doomed? There are some very real obstacles, but they’re actually related to what happens when the couple is in close proximity physically.

It depends on how you ask the question.

One boyfriend or a bunch of boyfriends? Conventional wisdom asserts that women prefer one mate at a time, but mammals in general are rarely monogamous. Can an evolutionary perspective help clarify some things?

The news is filled with a never-ending stream of tragedy and cruelty, but also with gestures and acts meant to improve the lives of others -- and the world. Here are 10 of our favorites.

When horrific events such as school shootings and terrorist attacks happen, they're covered non-stop in the media. You can't shield your child from every mention of tragedies 24/7, so what's the best way to discuss sensitive subjects?

You know these people. They dart in front of you when you're checking out at the store. They cut you off on the highway with nary a signal. Are they just jerks, or could something else be going on with them?

When famous people are caught in torrid romantic entanglements, it's not just tabloid fodder. It also can put a hard stop on career ambitions for both parties.

Ever since Beyonce publicly revealed her "baby bump" in 2011, tabloids and blogs tracked her growing belly with rapt attention, making Beyonce one of the most high-profile new moms of the 21st century. The following famous parents aren't all red carpet royalty, but each is a unique case study on how the limelight can impact raising kids.

Time magazine stoked a widespread breastfeeding controversy when it featured a 3-year-old boy suckling from his 26-year-old mother on a May 2012 cover. But when it comes to spurring debate, breastfeeding older children pales in comparison to some of the unconventional child rearing practices featured in this gallery.

What really makes us who we are: nature or the nurturing influence of parents? Behavioral geneticists think our DNA makes all the difference, but psychologists disagree. Who's right?