Melting Trends: Arctic Ice Completely Gone by 2020?
Environmentalist Dan Miller discusses images of arctic ice melting trends at the North Pole. He argues that light once reflected off the surface of the melting ice is now being absorbed by water, priming a feedback loop that will continuously accelerate the melting process. (03:03)

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La nataciÃ³n - cÃ³mo enseÃ±ar a nadar a una persona
Enseñar a nadar a una persona es una tarea que tiene que hacerse poco a poco y con mucha paciencia. (2:14)
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How to Use Inverse Operations to Isolate a Variable
In this video, the presenter explains how to isolate a variable by adding the inverse of a number.  She explains that you must add the opposite of a number (e.g. -1+1) to get a zero.  (01:52)
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Skip Counting By 7 Song - Beginner
The Counting By Sevens Song by Have Fun Teaching is a counting song that teaches skip counting by seven.  The video counts up to 98.  Great for fact families as well.  (03:04)
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Journey Through Space HD
Teachers will want to preview this first. You may also wish to push the 'play' cursor to access different parts of the video. This is a slow-moving video that could be used in the following ways: as a 'teaser' to introduce students to the science of astronomy, to show students the rotation of the Earth, to show younger students the 'night' side of the Earth, and to show students the what the planet looks like at night powered by electricity. According to the producer, this is a marvelous journey
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Lesson 10 - One Minute Luxembourgish
In lesson 10 of One Minute Luxembourgish you will learn a few useful phrases which all learners want to learn. Remember - even a few phrases of a language can help you make friends and enjoy travel more. Find out more about One Minute Languages at our website - http://www.oneminutelanguages.com. One Minute Luxembourgish is brought to you by the Radio Lingua Network and is Â©Copyright 2008.
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Protein Folding Pioneer
Cures for neurodegenerative diseases are more likely to be found when scientists better understand protein folding mistakes in cells. UMass Prof. Lila Gierasch is a leading authority on how proteins fold and why they misfold.
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