"Former vice president and climate change activist Al Gore warns that climate change could be an "existential threat" and calls President Trump's response an "outlier reaction." In a wide-ranging interview, Judy Woodruff speaks with Gore...

Easter Island off the coast of Chile has a major trash problem. It's near what's known as a "trash vortex" in the middle of the South Pacific and floating waste is constantly washing ashore. Local officials estimate the growing...

In the 70 years that plastic has been around, humans have created 9 billion tons of it -- most of which still exists. Are the existing strategies for tackling plastic pollution -- namely reusing and recycling -- really making any...

Delhi now outranks Beijing as the world's most polluted city. Carbon dioxide, ozone and fine carbon particles get trapped over India's capital, mostly due to dirty fuels, causing long-term health consequences such as lung and heart...

For those tired of the stresses and excesses of contemporary civilization, a survival expert in the Italian Alps offers a training program in living as the Neanderthals did. Participants endure a rough existence in the wilderness,...

Half the population of India lives in areas where water resources are highly stressed. In the coastal city of Chennai, rapid economic development and a population boom have jeopardized supplies of freshwater, prompting officials to rely...

How do the structures of organisms enable life's functions? Benchmarks for grades 2, 5, 8 and 12 are included.

What exactly is Consciousness? Well... that's kind of a gray area. In this episode of Crash Course Psychology, Hank gives you the basic ideas of what Consciousness is, how our attention works, and why we shouldn't text and drive......

"For all that's ever been said about climate change, we haven't heard nearly enough about the psychological impacts of living in a warming world," says science writer Britt Wray. In this quick talk, she explores how climate change is...

Trauma doesn't just affect the person who originally experienced it. It can also be passed down to their children and grandchildren.

How can a "thumbs up" sign help us remember five processes that impact evolution? The story of the Five Fingers of Evolution gives us a clever way of understanding change in gene pools over time.

What will become of humanity after spend a few hundred years on Mars? What will happen after a few thousand? Evolution has, and still is, shaping humanity in rather drastic ways. How long will humans stop being human and become Martian?

In this video Paul Andersen explains how information is processed in in animals. He starts by describing the different forms of information and how they are received by receptors. He explains how information is received by the brain and...

There's a compound found in squid skin that they use to change color and protect their cells, but it could also help us fight some of the most common disease-causing microbes out there.

As a diver in the 1970s, marine ecologist Enric Sala saw once-lush oceanscapes reduced to underwater deserts -- but later, in marine preserves across the globe, he also witnessed the ocean's power to rejuvenate itself when left to its...

Africa needs new energy sources to fuel its development, but the continent should invest in renewable energy instead of cheap, polluting alternatives like coal, says climate inclusion activist Chibeze Ezekiel. He tells the story of how...

Global obesity rates are on the rise, but body shaming campaigns are doing more harm than good, says medical anthropologist Nancy N. Chen. Reflecting on how the cultural histories of body ideals have changed over time, she offers a new...

To see and understand the countryside is a crucial part of moving towards a more livable future for everyone, says coder, artist and organizer Xiaowei R. Wang. They've observed that some of the most careful, thoughtful innovation is...

For architect Ole Scheeren, the people who live and work inside a building are as much a part of that building as concrete, steel and glass. He asks: Can architecture be about collaboration and storytelling instead of the isolation and...

There are a lot of weird places here on Earth, but here are a few of our favorite strange spots!

Today Hank talks with Dr. Cara Nelson about invasive plants that use toxic chemicals and rapid reproduction to outcompete native plants, and Jessi brings some adorable invasive birds. Dr. Nelson is a professor of Restoration Ecology at...

Humans are great at creating, and solving, problems. Hank talks with Gina McCarthy about the biggest public health problem we face today: climate change. Gina McCarthy is the Director of C-CHANGE (Center for Climate, Health and the...

In which Hank and John Green teach you about life on Earth. They won't be giving advice on how life should be lived, because this is a history series. Instead, they'll teach you about the earliest forms of life on Earth, and some of the...

The deadliest severe weather phenomenon is something you might not realize: extreme heat. Eleni Myrivili, chief heat officer of the city of Athens, Greece, explains that extreme heat and heat waves are often overlooked because they're...