Why do some people have seasonal allergies?
Adults Human
Ah, spring. Grass growing, flowers blooming, trees budding. For those with allergies, though, this explosion of new life probably inspires more dread than joy. So what's behind this annual onslaught of mucus? Eleanor Nelsen explains what happens when your immune system goes rogue.
The psychology behind irrational decisions
Adults Human
Often people make decisions that are not "rational" from a purely economical point of view - meaning that they don't necessarily lead to the best result. Why is that?
Why is being scared so fun?
Adults Human
At this very moment, people are lining up somewhere to scare themselves, be it with a thrill-ride or a horror movie. In fact, in October of 2015 alone, about 28 million people visited a haunted house in the US.
First Contact
Adults Human
Should We Contact Uncontacted Peoples?
The science of skin color
Adults Human
When ultraviolet sunlight hits our skin, it affects each of us differently. Depending on skin color, it'll take only minutes of exposure to turn one person beetroot-pink, while another requires hours to experience the slightest change.
Which Fish Did We Evolve From?
Adults Human
Today's oceans are full of fish with fins that couldn't evolve into limbs like ours. So, who are our ancestors and where did they go?
Is ADHD An Advantage?
Adults Human
Could ADHD be an evolutionary advantage?
Do Blind People Understand Vision? TommyEdisonXP
Adults Human
Tommy Edison, who has been blind since birth, talks about his understanding of vision, what impresses him about sight, and one fear that's motivated by blindness.
What would happen if you didn't drink water?
Adults Human
Water is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. So what role does water play in our bodies, and how much do we actually need to drink to stay healthy? Mia Nacamulli details the health benefits of hydration.
This Is the Most Amazing Biomimetic Robot Hand You've Ever Seen
Adults Human
Third arm? Robot tentacle? My dreams of having extra tentacles may come true!
What Happens When You Die?
Adults Human
What happens after you die?
The Specious Present
Adults Human
What is the specious present? And how do our brains perceive time?
GoPro: Pelican Learns To Fish
Adults Human
After being separated from his flock during a storm, Bigbird the pelican was taken in by the staff at a safari camp. Jeffrey, the camp manager, took Bigbird out each morning to fish and developed an unlikely friendship.
Why is my voice different when I hear a recording?
Adults Human
A weekly show where we endeavor to answer one of your big questions. This week, Kristina Bailey asks, "Why does our voice sound different when we hear an audio or video recording of it?"
Why Do We Cry?
Adults Human
Why does your face leak when you're sad or emotional?
Evolution Of Human Species
Adults Human
Watch the evolution of our species in under two minutes. Learn how paleoartist John Gurche draws on fossil discoveries and forensic techniques to create transfixing reconstructions of long-lost human ancestors.
Why Do We Have To Sleep?
Adults Human
Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here's a look at how sleep works, why we're not getting enough sleep, what happens if you DON'T sleep, and an idea about where sleep came from in the first place.