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When Metallomics Hit the Big Time

Learn how geologists became interested in the young discipline of metallomics, the study of life through the essential metals in enzymes.

Signs of Sea Level in the Landscape

Geologists can learn a lot about sea levels of the past by studying the landscapes of today.

The Expanding Earth Animation

The familiar expanding-Earth animation is an optical illusion based on a conceptual illusion.

The Promise and Pitfalls of Float

Float - loose rocks in the soil - can yield useful geologic information in areas where the bedrock is hidden.

Earthquakes in a Nutshell

Start here for the seismic basics: faults that cause earthquakes, types of seismic waves, damages they cause and more.

How to Read a Geologic Map

Understanding geologic maps starts with topography.

Official State Gems

Thirty-five states have official gemstones. Here they are, listed by state.

Gemstones to Minerals, Minerals to Gemstones

Big list of mineral names and their corresponding gemstone names.

About Geothermal Energy

Geothermal energy exploits the Earth's natural heat budget.

Coal in the Home

Americans don't burn coal at home any more, but it still works for much of the world.

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