The origin of life is one of the most important mysteries in all of science. When did life begin? How did life first evolve from chemistry? Where did life get started? In some primordial soup or somewhere else? Let's journey back to the...

Paul Andersen explains how to formulate questions to guide discussions and investigations. He starts by describing the proper type of questions that should be asked in an AP Biology classroom. He gives four examples of questions that...

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...

In 1990, an experiment conceived by Carl Sagan was performed using using the Galileo spacecraft. The purpose? To detect life on a planet based on measurements by a space probe. The experiment was successful, and abundant life was...

Right at the beginning of the Paleozoic, there was a huge explosion of more complex life. And that’s when things started to get really interesting. This is our second installment on the history of life, but you can watch in any order you...

When there’s only one species on an evolutionary branch, we call it a monospecific taxon. Studying these special species can help us better understand not just those sparse groups, but all life on this planet.

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How do we find planets -- even habitable planets -- around other stars? By looking for tiny dimming as a planet passes in front of its sun, TED Fellow Lucianne Walkowicz and the Kepler mission have found some 1,200 potential new...

Biologist Dan Gibson edits and programs DNA, just like coders program a computer. But his "code" creates life, giving scientists the power to convert digital information into biological material like proteins and vaccines. Now he's on to...

On a mission to create a hunger-free world, agricultural entrepreneur Cedric Habiyaremye makes the case for cultivating quinoa -- and other versatile, nutrient-rich grains -- in places experiencing malnutrition, like his native Rwanda....

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Financial literacy isn't a skill -- it's a lifestyle. Take it from Curtis "Wall Street" Carroll. As an incarcerated...

So, the stars made the elements, we're all made of star stuff, etc. But what does all this mean? This week Emily Graslie teaches you how the formation of chemical elements in the bellies of the earliest stars made life as we know it...

Uprisings of enslaved people in the United States were not uncommon, and they had a big influence on how the institution of slavery evolved. One uprising that gets less attention, historically, is the German Coast Uprising that took...

Squeaks is feeling a little wired and needs some story time to get sleepy this evening, so Jessi is showing him some videos about amazing scientists from history!

The SETI Institute's Jill Tarter makes her TED Prize wish: to accelerate our search for cosmic company. Using a growing array of radio telescopes, she and her team listen for patterns that may be a sign of intelligence elsewhere in the...

Squeaks and Mister Brown pretend to go back in time to learn more about Trilobites, using special clues from fossils!



Second Grade Next Generation Science
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Nanahuatl, weakest of the Aztec gods, sickly and covered in pimples, had been chosen to form a new world. There had already been four worlds, each set in motion by its own "Lord Sun," and each had been destroyed. For a new world to be...

In which John Green returns to William Shakespeare's Romeo and Juliet to explore the themes of true love, lust, and whether Romeo and Juliet were truly, deeply in love, or they were just a pair of impetuous teens. How exactly did Romeo...

Historian George Dyson tells stories from the birth of the modern computer -- from its 17th-century origins to the hilarious notebooks of some early computer engineers.

It's time to ring in the new year, so lots of people are ready to make their new year's resolutions. With the help of psychology, you too can be on your way to fulfilling your goals this year!

Questions of good and evil, right and wrong are commonly thought unanswerable by science. But Sam Harris argues that science can -- and should -- be an authority on moral issues, shaping human values and setting out what constitutes a...

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...

What do astronomers look for when they study exoplanets for signs of alien life? Hank explains how space telescopes are already yielding tantalizing clues of what other worlds might hold -- including water! -- and how the next generation...

New evidence suggests some fossils as the oldest known sign of life on Earth, and scientists may have a way to speed up the process of carbon neutralization in the ocean!

Community organizer Raj Jayadev wants to transform the US court system through "participatory defense" -- a growing movement that empowers families and community members to impact their loved ones' court cases. He shares the remarkable...