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Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

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The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

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The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

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Human Perception – Neurology

This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

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Takahē (Porphyrio hochstetteri)

Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..