In this video, Nova takes kids on a space expedition through our solar system. They explore each planet, learning interesting facts and discovering the unique characteristics of each one. From the scorching heat of Mercury to the stormy...

New NASA Cassini data shows that Saturn is not the world we once thought it was...

Almost everything you could want to know about Callisto.

Almost everything you could want to know about the 7th planet from the Sun, Uranus.

Almost everything you could want to know about Saturn's sixth largest moon, Enceladus.

J.R.R. Tolkien’s The Lord of the Rings trilogy and The Hobbit adventure that preceded it are full-fledged mythologies and histories unto themselves, making it a little strange to discuss the impact of real-world mythology and history on...

At the turn of the 20th century, trolls transitioned from fairy tales into novels, most notably in science fiction and fantasy. J.R.R. Tolkien's The Hobbit and The Lord of the Rings series brought trolls into the mainstream, where they...

Is it a coincidence? Or is something else at play here?

In 2017, Cassini ended its mission by disintegrating in Saturn's atmosphere. What were the final images it ever took?

Galaxies are not spinning tops. So how do stars move within them?

Supralateral arcs, ice pillars and sun pillars.

Mood rings are rings that have a stone or band that changes color in response to variations in temperature. They are also composed of liquid crystals, which undergo a change in color in response to changes in the temperature of the body...

Researchers estimate ancient temperatures using data from climate proxy records, i.e., indirect methods to measure temperature through natural archives, such as coral skeletons, tree rings, glacial ice cores, and so on. For example, the...

A series of rings surrounding the planet Saturn.
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Organic molecules that contain long carbon chains or rings and which tend to be insoluble in water, though soluble in organic solvents.
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Seahorses are terrible swimmers. Discover how this has influenced the way they look, what they eat and how they defend themselves. Biology - Animal Kingdom - Learning Points. Seahorses are a type of bony fish with a thin skin instead of...

How big is our Universe? Travel from Earth through the Solar System, past our Galaxy, to the Universe beyond. Physics - Universe - Learning Points. The Universe is constantly expanding. The Universe is already billions of light years...

The different ways scientists have explained the structure of the atom, and how it has changed throughout history.
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A look at the Burgess and Hoyt models, and how each explains the layout of urban settlements. Human Geography - Orientation And Settlements - Learning Points. The Burgess Model shows a city's development as a series of concentric rings,...

Since Galileo first sighted Saturn, scientists have been baffled by its beautiful rings. What are they made of and where did they come from? Physics - Our Solar System - Learning Points. Saturn's rings were first discovered by Galileo in...

We dissect and examine a cow\u2019s lungs. Before the dissection, the lungs are inflated to show the changes in volume that occur when mammals breathe. During the dissection the position and function of different parts are examined,...

Take a closer look at the four gas giants. They're called gas giants because they're made of gas – and they're giant!
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Joining the Cassini mission to explore Saturn.
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Learn more about the author of The Hobbit and Lord of the Rings and the creator of the Middle Earth universe.