Geophysics is the study of the forces that shape the Earth from a global perspective. Learn about gravity, plate tectonics and other topics.

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How the Earth Works

Even though it's tiny compared to the rest of the universe, the Earth is enormous, and it's extremely complex. Systems powered by the sun are able to sustain the various life forms living on Earth. Learn what ties all the parts of the Earth together.


Falling Fruit and Zero-G's: The Gravity Quiz

Falling Fruit and Zero-G's: The Gravity Quiz

Gravity governs the structure of the universe. Test your knowledge of this fundamental force with our gravity quiz! See more »

What conditions are required for life?

What conditions are required for life?

What conditions are required for life? You might be surprised to find out that there's no single definition. Learn more at HowStuffWorks. See more »

Could you dig a hole all the way to the Earth’s mantle?

Could you dig a hole all the way to the Earth’s mantle?

Could you dig a hole all the way to the Earth’s mantle? Find out how hard it is to dig a hole through the Earth and what you might find. See more »

How the Living Earth Simulator Will Work

How the Living Earth Simulator Will Work

Could the Living Earth Simulator really reproduce all the systems on earth, including life, climate and more? Read about the Living Earth Simulator. See more »

How Famine Works

How Famine Works

Famine might bring to mind historical tragedies or tiny children with swollen bellies. But how does famine -- a widespread loss of food -- actually happen? See more »

What is gravity?

What is gravity?

What is gravity? How does gravity affect virtually everything on Earth? Learn about gravity in this article from HowStuffWorks. See more »

Where does water come from?

Where does water come from?

Where does water come from? We know that water surrounds us, but have you ever wondered about its origins? Find out where water comes from. See more »

Can we manufacture matter?

Can we manufacture matter?

To manufacture matter would require a great deal of engineering and luck. Find out of we can manufacture matter in this article from HowStuffWorks. See more »

What secrets of gravity have been uncovered in the last 50 years?

What secrets of gravity have been uncovered in the last 50 years?

Are there secrets of gravity that we have yet to discover? Learn about some of the secrets of gravity that have been uncovered in recent history. See more »

Will we ever run out of magma?

Will we ever run out of magma?

Will we run out of magma, or is there an infinite supply within the Earth's crust? Find out if we will ever run out of magma. See more »