Topic: Earth

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Why Earth Has Two Levels

Earth’s outer shell is made of two materials whose different densities and thicknesses give rise to two distinct “levels” on the planet’s surface. And evidently these two materials—continental crust and more dense ...

Does ‘the ozone hole’ hold the secret to fixing climate change?

We don’t hear much about 'the hole' in the ozone layer anymore. That’s because we’ve all but fixed it, thanks to consumer choices and a massive international agreement called the Montreal Protocol. Can we learn anythi...

Why do we confuse weather and climate?

Weather and climate are not the same things, yet we might get confused between the two. What is weather and what is climate? And how is climate like the game Plinko? In this episode of PBS Digital Studio's Hot Mes...

Dr. Jane Goodall’s Google Doodle for Earth Day 2018

In 1970, 20 million Americans came together to deliver a message: our environment sustains us, and so we too must work to sustain it. Since then, Earth Day has spawned a movement of millions across the globe working t...

How long have we known about climate change?

What is climate change, how long have we known about it, what will its effects be, and what can we do to help solve it? Hot Mess is a new PBS Digital Studios YouTube series from hosts Miriam Nielsen, Talia Buford, and...

Arena, a fast-paced look at the earth from above

Using images captured by Google Earth, Ireland-based artist Páraic McGloughlin speeds through scheme after scheme of human-made shapes and structures from high above in the experimental film short Arena. From McGlough...

Evolution 101 & how natural selection works – NOVA PBS

What is evolution, how has it created Earth's biodiversity, and how can a phylogenetic or evolutionary tree—a tree of life—help us better understand how different species are related? Learn some basics from this Evolu...

Speed up geologic time with a DIY squeeze box

Build. Observe. Play in the sand and dirt. Making your own easy-to-build squeeze box is fun for lots of different reasons, including educational ones. This Science Snacks video with Eric Muller from The Exploratorium ...

Where does Space begin?

How far away is Space from where you are at this moment? How much closer is it when you're flying in a plane? And how close is the International Space Station to Earth if we can spot it in the sky? Travel up, up, u...

Falcon Heavy & Starman, a montage of SpaceX’s historic test flight

On February 6, 2018, SpaceX successfully launched a heavy-lift rocket called Falcon Heavy, making it "the world's most powerful booster since NASA's Saturn V." For dummy payload, a Tesla Roadster belonging to SpaceX f...

Making Artificial Earthquakes with a Four-Tonne Steel Ball

In Göttingen, Germany, there's a four-tonne steel ball that can be raised up a 14-metre tower -- and then dropped in less than two seconds, crashing back to earth. It makes tiny, artificial earthquakes. Tom Scott v...

How deep have humans dug into the Earth?

From the deep end of Olympic swimming pools to The Paris Catacombs to Switzerland's Gotthard Base Tunnel to the Z-44 Chayvo Well in eastern Russia, travel down into the planet via this surprising Tech Insider animatio...

Hunga Tonga-Hunga Ha’apai, The Birth of a New Island

In late December 2014 into early 2015, a submarine volcano in the South Pacific Kingdom of Tonga erupted, sending a violent stream of steam, ash and rock into the air. When the ash finally settled in January 2015, a n...

NASA simulates how dust, smoke, and sea salt have traveled the planet

Watch as sea salt, dust, and smoke—aerosol particles traveling on the winds—have moved across our planet in 2017. This animated simulation, "based on both satellite observations and computer models that use physical e...

Eclipses Throughout Our Universe – Out There

An exercise in cosmic geometry. A reminder that we live on one sphere among many, all moving to the laws of Kepler, Newton and Einstein. The moon’s orbit around the Earth is slightly tilted, so the shadow of the new m...

How to watch a total or partial solar eclipse

On Monday, August 21st, 2017, sky gazers can witness a total or partial solar eclipse—weather-permitting and depending on their location on the planet—as it traverses North America. There's been a lot of excitement in...

What counts as a mountain?

Mountains: super tall, rocky landforms that rise high above the surrounding environment, much higher than hills. We might draw one as a single peak like Mount Fuji, or as a zig zag line of peaks representing a mountai...

The Big Dipper Through Time

Stars aren’t still--they move through space. Our Sun and the seven stars that form the Big Dipper in the constellation Ursa Major all orbit the center of the Milky Way at different speeds. So why do today’s constellat...

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