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Cross-section of layered rock strata with three coiled shell fossils and a curved tusk embedded at different levels

Earth ScienceGuide

What Died and When: Reading Earth’s History in Eras and Fossils

Earth history eras and fossils, from the Precambrian to now: what the rock record actually shows at each boundary, and why the lines fall where they do.

21 min read

Field notes

Hand-picked from the archive: the explainers readers cite, link, and keep coming back to.

Earth & sky

The planet underfoot and the atmosphere above it, from bedrock and volcanoes to storm fronts and map lines.

Earth systems

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Earth Science /

Mafic Vs. Felsic Rocks: Know the Difference

Classification of rocks, minerals, and magma based on the silica content present in them defines them as either mafic or felsic. Learn more about the Mafic vs. Felsic geological classification through this ScienceStruck article.

4 min read

Weather & climate desk

Weather & ClimateGeography

The living world

Cells, species, and ecosystems, beside the curious facts that hold up to checking.

Life, observed

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Matter & reactions

Elements, compounds, and the reactions that run the world, with experiments you can actually try.

The chemistry shelf

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From the lab bench

Science Projects

Physics & technology

The laws of energy and motion, beside the machines and instruments built on them.

The measurement desk

PhysicsMath

Technology in practice

TechnologyInventions

Latest articles

The newest additions across every ScienceStruck shelf.

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