Have you ever found yourself getting teary-eyed on a plane, and not because of the lack of legroom? Turns out there's a few good reasons that science says that's totally normal. Don't forget to throw some tissues in your carry-on.<br/>

Plenty of animals have tears that moisturize their eyes. But does that mean they’re sad? Quick Questions explains!

You may have thought that crocodile tears were just a figure of speech, but it turns out they're real, and may help those of us with dry eyes.

You might think that you’re pretty familiar with your body, but it turns out that our bodies still have some surprises for us!

Plenty of animals have tears that moisturize their eyes. But does that mean they're sad? Quick Questions explains!

Why do we cry? It's weird. Humans leak water out of their faces when they get sad. Are we the only animals that do this? What does it mean? What is it for? Here's the science of human tears!

You might think that you’re pretty familiar with your body, but it turns out that our bodies still have some surprises for us!

You may have thought that crocodile tears were just a figure of speech, but it turns out they're real, and may help those of us with dry eyes.

Have you ever wondered why you feel better after a good, hearty sob? Well, it turns out the reasons are kind of a mystery, and they range from social support to brain temperature.

At TEDWomen, Tony Porter makes a call to men everywhere: Don't "act like a man." Telling powerful stories from his own life, he shows how this mentality, drummed into so many men and boys, can lead men to disrespect, mistreat and abuse...

Squeaks is worried because Jessi is crying, but it's not because she is sad. She's cutting onions!

We have so many different emotions that pop up from time to time, so Squeaks and Jessi are playing a guessing game while they watch videos that remind them why we have certain emotions!

Babies cry a lot, but some babies cry a lot more than others. These babies are said to have colic - and doctors aren’t totally sure what causes it.

Whether we cry during a sad movie, while chopping onions, or completely involuntarily, our eyes are constantly producing tears. Alex Gendler tracks a particularly watery day in the life of Iris (the iris) as she cycles through basal,...

Have you ever wondered why we cry? In today's episode of SciShow, Hank gives us the answer, covering different types of tears and whether we are the only species to get all teary eyed during the final scene of a good movie.

Many African countries are poor for a simple reason, says entrepreneur Magatte Wade: governments have created far too many obstacles to starting and running a business. In this passionate talk, Wade breaks down the challenges of doing...

Here's a talk about tears -- and why crying isn't something to be afraid or ashamed of. Exploring the science behind the mood-boosting power of crying, childbirth and lactation educator Kathy Mendias shows how tears can enhance your...

For more than a decade, Opportunity has been one of our best tools for understanding Mars, but after eight months of listening and hoping, it was officially time to put the rover to bed.

After his son was diagnosed with cerebral palsy, Billy Samuel Mwape realized that his project management skills might be put to use to support his child's special needs. In this inspiring, personal talk, he describes how project...

What if you could experience a story with your entire body, not just with your mind? Nonny de la Pena is working on a new form of journalism that combines traditional reporting with emerging virtual reality technology to put the audience...

Everybody cries sometimes, and that's ok! But have you ever wondered why being sad makes tears come out of your eyes, or why you usually feel better after you cry? Jessi and Squeaks have the answers!

Howcast - Learn what "Ferberizing" is from sleep specialist Janet Kennedy, Ph.D. in this how-to-sleep for children Howcast video.