Earth’s magnetic field is special! And, in the last 20 years, we’ve made incredible discoveries, thanks to a squad of probes that have flown around our planet, observing solar wind as a team!

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?

The physics of the perfect storm

The Kepler mission has determined that terrestrial planets are extremely common, and may orbit most stars in the Milky Way. But these planets are difficult to directly image because they're dense and small. Our Sun is about ten billion...

Concrete is the second most-used substance on Earth (behind water), and it's responsible for eight percent of the world's carbon footprint. Cement researcher Karen Scrivener shares the research behind a pioneering new kind of cement...

According to some of the latest New Horizons data, Pluto's got flowing nitrogen ice and only half the atmosphere it had two years ago. Plus, the latest batch of exoplanets includes a world that's a lot like Earth... probably.

This week on Crash Course mythology, Mike is talking to you about floods. You may have heard the story of Noah and the Ark from the Bible, but that is not the only deluge story humans tell. It's a common thing across culture. You could...

In 1985, scientists discovered that 60 carbon atoms could join up to form one big soccer ball shape: a buckyball! It's a strange little molecule.

Photosynthesis plays a huge role in regulating the earth's CO2. But what happens when the temperature gets high enough that photosynthesis slows down?

In which John Green, Hank Green, and Emily Graslie teach you about, well, everything. Big History is the history of everything. We're going to start with the Big Bang, take you right through all of history (recorded and otherwise), and...

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...

Beetles are the most diverse group of complex organisms on Earth, making up over 20% of all named animal species. One in five species on this planet is...a beetle. How did one group of organisms get THAT massive?

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...

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.

...

SciShow Space describes a new phenomenon that might be out there: Stars made entirely out of metal. But it's not quite what it sounds like!

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...

What if there were a tunnel through the middle of the earth and you jumped in?

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
Crossc
utting Concepts
Patterns: Observed...

In just the last century, we've made an astounding amount of scientific progress. And thanks to some of that progress, we can now share 10 of those discoveries with you in a video on the internet!

In this video Paul Andersen explains how the Earth's climate will natural change due to interactions between the Sun and Earth, volcanism, and plate tectonics. Species may go extinct leading to adaptive radiation or may move to a...

Hank explains where that over-simplified image of evolution comes from and what it is actually supposed to mean.

Hank hits you with a ton of news this time - Amazon CEO Jeff Bezos has plans to retrieve Saturn V rocket engines from the bottom of the Atlantic; new research on the impacts from the Deep Water Horizon oil spill to life in the Gulf of...

SciShow takes you on a tour of Canada's Bay of Fundy, home of the largest tidal range in the world.

Astronomers have thought for years that Earth was dry in the beginning, but a new paper suggests that Earth might have actually started out wet! And In other meteorite news, a new study of impact sites might give us new clues about...