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01:06
Why do our teeth turn yellow? | #aumsum
18
B2 High-Intermediate
US
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10:58
What causes Pneumonia? plus 9 more videos.. #aumsum
32
B2 High-Intermediate
US
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01:22
Why can't you use phones on planes? | #aumsum
75
B1 Intermediate
US
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04:39
Potential and Kinetic Energy for Kids | #aumsum
14
B1 Intermediate
US
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01:33
What causes chapped lips? | #aumsum
25
B1 Intermediate
US
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06:14
Structure of a Neuron | #aumsum
11
B2 High-Intermediate
US
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02:26
Modes of Transportation | Videos for Kids | #aumsum
93
A2 Basic
US
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10:59
Why are planets spherical? plus 9 more videos..…
9
B2 High-Intermediate
US
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01:05
Why do we use a black umbrella in summer? | #aumsum
12
B1 Intermediate
US
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05:10
Science of Snowflakes | #aumsum
7
B2 High-Intermediate
US
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06:54
How do we know that our Stomach is Full? | #aumsum
53
B1 Intermediate
US
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07:07
Are Dolphins Smart? | #aumsum
32
B2 High-Intermediate
US
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