Throughout the Cenozoic Era -- the era we’re in now -- marsupials and their metatherian relatives flourished all over South America, filling all kinds of ecological niches and radiating into forms that still thrive on other continents.

While sour taste's original purpose was to warn vertebrates of danger, in a few animal groups, including us, its role has reversed. The taste of danger became something it was dangerous for us to avoid.

Our DNA holds evidence of a huge, ancient pandemic, one that touched many different species, spanned the globe, and lasted for more than 15 million years.

Toxodon was one of the last members of a lineage that vanished 11,000 years ago after thriving in isolation for millions of years. And its fossils would inspire a revolutionary thinker to tackle a bigger mystery than Toxodon itself:...

Technologist Yat Siu believes the "open metaverse" -- a decentralized version of the internet also known as web3 -- is laying the foundation for a freer, fairer, more prosperous society. In a future-focused talk, he explores the...

What if we could harness the power and value of all that we discard? Circular economy builder Garry Cooper presents a compelling vision for transforming cities into sustainable, circular economies, citing real-world examples of how...

When you learned about the Earth’s interior in school, you were probably shown a diagram that looked like a perfect layer cake. But we've known for a long time that that diagram is... inaccurate at best, and leaves out information that...

High elevations can be a problem for humans. Since the air is thinner, you get less oxygen with every breath, leading to all kinds of negative side effects. But there are millions of people around the world who spend their whole lives at...

A new healing gel helped mice regrow brain tissue after a stroke, and scientists suspect someone out there is producing a bunch of ozone-destroying CFCs in defiance of an international agreement! Hosted by: Hank Green

Scientists know that the Y chromosome has been shrinking in size over millions of years, but recent studies suggest that it has more important genes, besides the ones that cause biological maleness. Hosted by: Michael Aranda

Who runs the world? Political scientist Ian Bremmer argues it's not as simple as it used to be. With some eye-opening questions about the nature of leadership, he asks us to consider the impact of the evolving global order and our...

Pirate fishing, oil spills and other undetected crimes are destroying ocean ecosystems -- but we can't stop what we can't see. Harnessing the power of satellite data and AI to catch maritime offenders in the act, ocean conservation...

Today in many countries solar is the cheapest form of energy to produce. Millions of homes are equipped with rooftop solar, with most units paying for themselves in their first seven to 12 years and then generating further savings. So,...

More than 30 million people in the US are eligible to have their arrest and conviction records cleared -- but most people who qualify either can't afford it or simply don't know it's an option. In this gripping talk, second chance...

In this video Paul Andersen explains how energy is used in chemical processes and everyday life. Students should understand that energy is neither created or destroyed but is converted. Most of the energy is delivered to our planet...

Scientists know that the Y chromosome has been shrinking in size over millions of years, but recent studies suggest that it has more important genes, besides the ones that cause biological maleness.

The aftermath of the collapse of the Soviet Union and its Warsaw Pact had a huge impact on the countries of Eastern Europe. As the former satellite states turned away from communism and Soviet influence, some of them shifted toward...

TED curator Chris Anderson shares his obsession with questions that no one (yet) knows the answers to. A short intro leads into two questions: Why can't we see evidence of alien life? And how many universes are there?

Luzia, the oldest human fossil in the Western hemisphere, was lost to the Brazil National Museum fire, but around same time, three new species of ancient primates were discovered in San Diego Natural History Museum.

The 21st century brought a whole new host of challenges to the world, and Europe was no exception. In this video you'll learn about how an increasingly connected and complex world led to some pretty deep rifts in countries across the...

Though the common ancestor of all modern birds could fly, many different bird species have independently lost their flight. Flight can have incredible benefits, especially for escaping predators, hunting and traveling long distances. But...

Mass surveillance is worse than you think, but the solutions are simpler than you realize, says lawyer, technologist and TED Fellow Albert Fox Cahn. Breaking down the crude tactics law enforcement uses to sweep up massive amounts of data...

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
Standards
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utting Concepts
Patterns: Observed...

A lot of what we know about ancient human civilizations comes from the things they leave behind. But sometimes, humans don’t live in places long enough to leave these clues. So, some researchers have turned to techniques outside...