Volker Theinhardt Books

How my heart works
How my heart works

By Ulrik Hvass

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Demonstrates how the heart acts as a pump to move blood along the arteries and veins to all parts of the body.

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What is balance?
What is balance?

By Marima Faivre D Arcier

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Presents explanations for why things balance or need to balance, with two suggestions for experiments.

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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