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Mole

1:29

How Hard Do Moles Dig? | ScienceTake | The New York Times

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A Very Adorable Baby Mole Grows Up Overnight | The Dodo Little But Fierce

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The bizarre star-nosed mole: The world’s fastest eater

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Concept of Mole - Part 1 | Atoms and Molecules | Don't Memorise

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Watch A Live Mole Dig His Way To Freedom

The mole is the unit of measurement for amount of substance in the International System of Units (SI). The unit is defined as the amount or sample of a chemical substance that contains as many constitutive particles, e.g., atoms, molecules, ions, electrons, or photons, as there are atoms in 12 grams of carbon-12 (12C), the isotope of carbon with standard atomic weight 12 by definition. This number is expressed by the Avogadro constant, which has a value of approximately 6.02214076×1023 mol−1. The mole is an SI base unit, with the unit symbol mol.