In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today.

In this video Paul Andersen describes both weather and climate. Weather is the day-to-day conditions on the Earth's surface, including temperature, wind, humidity, air pressure, and precipitation. Climate are the long term conditions...

With a solid understanding of biology on the small scale under our belts, it's time for the long view - for the next twelve weeks, we'll be learning how the living things that we've studied interact with and influence each other and...

How do you talk to someone who doesn't believe in climate change? Not by rehashing the same data and facts we've been discussing for years, says climate scientist Katharine Hayhoe. In this inspiring, pragmatic talk, Hayhoe shows how the...

De-extinction, or using the power of modern biotechnology to bring back extinct species like mammoths and dinosaurs, would be cool. But is it really as easy as the movies make it look? Or do the cruel hands of time make it impossible?...

Could we have a possible 9th Planet? Hank Green tells us what we think we know with this elusive object.

While the weather in Iceland is often cold, wet, and windy, a nearly endless supply of heat bubbles away below the surface. In fact, almost every building in the country is heated by geothermal energy in a process with virtually no...

There's a region of Earth's atmosphere known as the South Atlantic Anomaly, and it’s one of the most dangerous near-Earth areas of space, both for satellites and humans.

In this video Paul Andersen describes the four major spheres on planet Earth. The geosphere makes up the mass of the planet and includes the major landforms. The hydrosphere is all of the water and the atmosphere is all of the gases. ...

As the Earth's surface temperature gradually rises, it has become vital for us to predict the rate of this increase with as much precision as possible. In order to do that, scientists need to understand more about aerosols and clouds....

Sustaining life requires substantial energy and matter inputs. The complex struc- tural organization of organisms accommodates the capture, transformation, trans- port, release, and elimination of the matter and energy needed to sustain...

At 8,850 meters above sea level, Qomolangma, also known as Mount Everest, has the highest altitude on the planet. But how did this towering formation get so tall? Michele Koppes peers deep into our planet's crust, where continental...

North America didn't always have its familiar shape, nor its famed mountains, canyons, and plains: all of that was once contained in an unrecognizable mass, buried deep in Rodinia, a huge supercontinent that lay on the face of the Earth....

Turns out, going to Mars in the 80s could have been a thing.

Recycling trash is one really important way that we can help the Earth stay clean! It's much better to recycle things than throw them away, but it's super important to recycle plastic! Jessi is here to tell you why!

For the last 12 years, Carter Emmart has been coordinating the efforts of scientists, artists and programmers to build a complete 3D visualization of our known universe. He demos this stunning tour and explains how it's being shared with...

Learn about asteroids, meteors, and comets and how they can affect earth!

In this video Paul Andersen explains how the resources required for survival come from the Earth. The resources are not evenly distributed on the planet and neither are the humans. According to the NGSS we need to limit the use of...

You know we have four seasons: spring, summer, fall, and winter. But do you know why we have seasons? Jessi shares the answer!

Earth is a huge planet full of incredible sights and amazing creatures! But have you ever wondered where the Earth came from in the first place? Well, by looking at other stars and planets, scientists think they have a pretty good idea!

Nature reveals itself to us in unique ways, if we stop and look at the world through a window of time, says photographer Stephen Wilkes. Using a special photographic technique that reveals how a scene changes from day to night in a...

This edition of SciShow News really is full of "news." Scientists have discovered a new moon orbiting Neptune, a new tick-borne virus threatening the United States, and a new species of shrew who is a real hero. Let's get to it!

There's a lake so deadly that anything that goes for a swim gets pickled. Yet there's a thriving ecosystem literally living on the edge, which might give astrobiologists a hint at how life could thrive on other worlds.

Are humans really Earth's most dominant species? Let's put all of the planet's living things on a scale and see what has amassed the most mass. This week we break down the concept of "biomass" to judge Earth's living things from top to...