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Harvard-Smithsonian Center for Astrophysics: Time and the Calendar

By TL Editors

Discover the importance of time and the calendar, and how they each bring order to life.

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Ted Ed: Where Do Superstitions Come From?

By TL Editors

This Friday is the 13th!

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CK-12 Foundation: Earth Science: Growth of Human Populations

By TL Editors

Teaching Kids to Examine Media Critically

Teaching Kids to Examine Media Critically

By TL Editors