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20
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01:06
Why do we yawn? | #aumsum
88
B1 Intermediate
US
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04:15
Why do Blood Types matter? | #aumsum
84
B1 Intermediate
US
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00:58
Why dont spiders stick to their webs? | #aumsum
81
B1 Intermediate
US
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04:21
Do Smartphones make our Eyes Worse? | #aumsum
80
B2 High-Intermediate
US
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05:31
Why is it hard to cure Common Cold? | #aumsum
78
B1 Intermediate
US
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Folder
01:22
Why can't you use phones on planes? | #aumsum
75
B1 Intermediate
US
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Folder
01:01
What causes earthquakes? | #aumsum
71
B1 Intermediate
US
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Folder
05:16
Life Cycle of a Butterfly | #aumsum
70
B2 High-Intermediate
US
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Folder
01:06
Why does ice float? | #aumsum
69
B2 High-Intermediate
US
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Folder
06:11
Global Warming for Kids | #aumsum
65
B1 Intermediate
US
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Folder
01:04
Why do we get angry when we are hungry? | #aumsum
64
B2 High-Intermediate
US
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Folder
05:41
Balanced Diet | #aumsum
63
B2 High-Intermediate
US
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