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772 articles found

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Logistics

Logistics That Skips the Warehouse: Cross-Docking

Cross-docking is a logistics operation in which incoming freight is not stored long-term but is sorted, transshipped, and shipped out right away. This article covers its definition

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Earth science

When Compasses Pointed South: Geomagnetic Reversal

A geomagnetic reversal is when Earth’s magnetic north and south poles swap places. This piece covers how Earth’s magnetic field is made, how scientists found traces of past reversa

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Chemistry

Separating by Differences in Boiling Point: Distillation

Distillation heats a liquid mixture, sends the more volatile components off as vapor first, then cools that vapor back into liquid to separate what was mixed. We look at its histor

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Physics

Water Droplets Floating on Vapor: The Leidenfrost Effect

Why does a drop of water skate across a very hot pan and last longer than on a merely warm one? This article explains the Leidenfrost effect, from the vapor cushion that lifts the

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Library & information science

Books Are for Use: The Five Laws of Library Science

The Five Laws of Library Science are five short principles, published by the Indian mathematician and librarian S. R. Ranganathan in 1931, that sum up whom and what a library exist

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Chemistry

Water That Doesn't Freeze When It Should: Supercooling

Why does water sometimes stay liquid below freezing? This article explains what supercooling is and how it works, everyday examples such as clouds, freezing rain, and hand warmers,