Many couples hope for a sign that they're...

When you're dealing with an overwhelming load...

VIDEO: How does age affect your sex life?

VIDEO: The science of falling in love.

VIDEO: A study led by Craig Morris of Binghamton University revealed some surprising benefits to getting cheated on.

VIDEO: Research has shown that there are topics you should focus on to turn a first date into a second and possibly more.

VIDEO: Relationship therapist Esther Perel explains the overlap of innate values we desire in our romantic partners and office colleagues.

VIDEO: Scientists compared what men and women valued in a relationship in 1939 with what they valued in 2008.

Relationships are never easy. By definition...

Thinking about tying the knot? You're probably...

Renowned relationship expert Esther Perel says it best.

VIDEO: A biological anthropologist says people cheat for a variety of reasons. But, a few may not be what you were blaming.

As any number of hand-wringing...

Love is in the air... or body odor.

Renowned relationship expert Esther Perel shares some of her key findings.

The property is now a tourist destination, and visitors can spot the Kurokis happily smelling their flowers.

In a time of sexts, Tinder, and Snapchat...

Ever been in the middle of a heated argument...

After 67 years of marriage, this guy still has some tricks up his sleeve.

In some ways marriage has taken on a terrifying...

VIDEO: NASA's New Horizons spacecraft took us to Pluto for the first time in July 2015. Scientists are astonished by the incredible features they have observed on the dwarf planet, including a 1,000 mile wide region covered in nitrogen snow that resembles a heart. But we have reason to believe Pluto's heart is a bit warmer than the ice the covers it.

Candy hearts and boxes of chocolate line the...

With Valentine's Day right around the corner...

Here's how they found each other.

Data analyst and writer Amy Webb left her...

VIDEO: Research has shown that there are topics you should focus on to turn a first date into a second and possibly more.

Today, about 3 million married Americans and as...

VIDEO: The science of falling in love.

VIDEO: It's so simple.

VIDEO: Renowned relationship expert Esther Perel has one takeaway from her years of counseling couples.

VIDEO: Renowned relationship expert Esther Perel says it best.

VIDEO: Warning: they get personal.

VIDEO: Esther Perel, couples therapist, describes her theory of erotic intelligence.

VIDEO: Sex therapist Esther Perel talks about how couples, who have lost the romance in their partnership, can re-ignite their desire toward each other.

VIDEO: Psychologist Ty Tashiro explains the scientific formula for choosing a partner based on three traits (and no more).

VIDEO: Esther Perel offers her thoughts on when sharing something with your partner can do more harm than good.

A few years ago, I was bemoaning my love life...

VIDEO: Choosing to get married is one of the most important decisions you can make. However there are some important things you should know about a prenuptial agreement before walking down the aisle.

Spend any time reading grocery checkout line...

It's amazing how much just a few words can make...

Think back to the last time your partner did...

Before there was Tinder or OKCupid, people had...

Research suggests that being in a happy...

VIDEO: A study conducted by researchers at the University of London has revealed some interesting information about neurons in the male brain.

Gaspar Noe, the Argentinian filmmaker based in...

Why do relationships fail? Beyond the usual...

Crafting the perfect profile is one of the...

VIDEO: Being cheated on is a terrible feeling. That's why it's important to know what to look for in order to tell if your partner is being unfaithful.

While it's normal to have sexual fantasies...

When considering a long-term...

VIDEO: The science of falling in love.

If you want to know how good your relationship...

Do you have a secret list of things that...

VIDEO: Over two million men use Grindr -- a dating app for gay and bisexual men. CEO and founder Joel Simkhai brings us into his world.

At a 92Y event, psychologist JoAnn Deak...

VIDEO: Adam Galinsky is a professor at Columbia University and has published numerous scientific articles in the fields of management and social psychology. We asked him to give us his biggest tips to a happy relationship.

VIDEO: How does age affect your sex life?

"Power couple" used to be shorthand for the...

VIDEO: Maths can make love work.

Working around the clock to till the fields or...

Looking for love? Maybe it's time to move...

If you're a real hands-in-the-dirt...

VIDEO: NASA's New Horizons spacecraft took us to Pluto for the first time in July 2015. Scientists are astonished by the incredible features they have observed on the dwarf planet, including a 1,000 mile wide region covered in nitrogen snow that resembles a heart. But we have reason to believe Pluto's heart is a bit warmer than the ice the covers it.

VIDEO: Relationship expert and author Melissa Schneider talks about traditional marriage priorities for the Chinese and how they may be changing.

Love is...

There's been a lot of talk lately about how dating apps like Tinder are ruining romance.

While each relationship is unique, researchers...

"Today" show host Matt Lauer asked Donald Trump...

People lie everyday, so if you're concerned...

VIDEO: What you need to know before you get married.

If someone's ever told you they don't use...

VIDEO: Licensed psychotherapist and relationship expert, Rachel Sussman shares 6 ways to keep things fresh in a long-term relationship.

VIDEO: Bill Rancic offers his secrets to a great marriage.

Americans have a notoriously complicated...

VIDEO: We looked at a handful of studies from universities and scientists from around the world and the results are in. These five things will make you appear more attractive to others.

Keeping up appearances creates tension.

Former Arkansas Gov. Mike Huckabee (R) believes...

sex - quarrels = x.

The Pew Research Center just released a study...

Romantic love is shrouded in mystery.

VIDEO: Licensed psychotherapist and relationship expert Rachel Sussman explains how often is "normal" for couples in happy relationships to have sex.

It's hard to think of a more awkward experience than talking to an attractive stranger.

Humans love to flirt.

Infidelity is common in France, but no one in...

They fall in love faster because they’re so visual.

1) Ask a friend.

VIDEO: A small study from the University of Western Ontario shows how people deal with breakups on Facebook.

Love may not be a drug, but it can certainly feel like one.

When Neil deGrasse Tyson brought up Tinder...

What could be more terrifying than talking to someone you're attracted to?

Sofia Hellqvist doesn't fit the typical...

Red flags.

Over the course of two days last week, camera...

When going off the registry, there are a few things to steer clear of.

VIDEO: The science of falling in love.

VIDEO: How does age affect your sex life?

It's not all a mystery.

Since in many species, sperm is males' only...

Young couples have no way of predicting what...

VIDEO: Sex expert, Dr. Bat Sheva Marcus, shares this one surprising tip for couples.