In one day, in one city, in one neighborhood -- what if everyone put their guns down? Erricka Bridgeford is a peacemaker who wants to stop the murders and violence in her hometown of Baltimore. So she helped organize the Baltimore...

The human body generally grows in a predictable pattern, but in one rare case, one American girl essentially remained a toddler her entire life.

Over 2,500 years ago, one of ancient Greece's most celebrated popstars and erotic poets enraptured listeners. The singer-songwriter offered a uniquely intimate perspective on love, passion, and longing, and was the first on record to...

After a terminal cancer diagnosis upended 12 years of remission, all Elaine Fong's mother wanted was a peaceful end of life. What she received instead became a fight for the right to decide when. Fong shares the heart-rending journey to...

Of the more than 7,000 known species of amphibians in the world, an estimated one third are now threatened with extinction. Hank breaks down the science behind the decline of amphibians around the world, and what you can do to help.

Sebastian Junger has seen war up close, and he knows the impact that battlefield trauma has on soldiers. But he suggests there's another major cause of pain for veterans when they come home: the experience of leaving the tribal closeness...

What's haunting Carrie Poppy? Is it ghosts or something worse? In this talk, the investigative journalist narrates her encounter with a spooky feeling you'll want to warn your friends about and explains why we need science to deal with...

Working in the White House in the 1840s may have been more hazardous than we thought.

SciShow graphics guy Louey Winkler discusses LED contact lenses and the implications of enhancing and assisting human beings with technology, and then attempts to stump Hank with a physics riddle. Jessi from Animal Wonders shares Stumpy...

We all know that we need things like water and oxygen to live, but what happens when you get too much of a good thing?

One day, twin brothers Junajpu and Ixb'alanke discovered their father's hidden ballgame equipment and began to play. Hearing their vigorous game, the lords of the underworld sent a messenger to challenge the boys to a match. Despite the...

Knowing a few things about human psychology can help us avoid some of the thousands of accidents that injure or kill children around the world every year.

His reign marked the beginning of one of history's greatest empires . . . and the end of one of its first republics. Was Rome's first emperor a visionary leader who guaranteed his civilization's place in history, or a tyrant who...

Paul Andersen explains how genes control the timing and coordination of embryo development. Seed germination initiates the discussion of cell differentiation. The SRY gene and genetic transplantation shows the importance of embryonic...

Today, there are many ways to conceive a child, thanks to assisted reproductive technologies like IVF and egg-freezing. But the law lags behind these advancements, says attorney Ellen Trachman, troubling parents-to-be with...

Cecil was one of the most thoroughly studied lions in Africa. And thanks to him, we know several reasons why the death of one big cat can be a big deal.

SciShow News explores how a diseases that was officially eliminated in the U.S. has made a sudden comeback.

Learn about 10 plants that could kill you in SciShow’s first List Show!

Infidelity is the ultimate betrayal. But does it have to be? Relationship therapist Esther Perel examines why people cheat, and unpacks why affairs are so traumatic: because they threaten our emotional security. In infidelity, she sees...

All new products must pass through the "valley of death" before they reach the market. Many never make it out, and sometimes that's OK -- if they don't work, don't fill a need or for any number of reasons. One of the fields where this...

Chris Abani tells stories of people: People standing up to soldiers. People being compassionate. People being human and reclaiming their humanity. It's "ubuntu," he says: the only way for me to be human is for you to reflect my humanity...

Microbes are all around us, on everything we touch, drink, or eat. While most microbes can't hurt us, you don't have to go much farther than your own backyard to find some that really can! Chapters PLAGUE 0:39 TULAREMIA 4:48...

When spiders die, their tiny legs curl up tight against their body, because spiders don’t use muscles to extend their legs. Instead, they have hydraulic legs!

Wofford College president Bernie Dunlap tells the story of Sandor Teszler, a Hungarian Holocaust survivor who taught him about passionate living and lifelong learning.