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05:04
What if all Insects Disappeared? | #aumsum
95
B1 Intermediate
US
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05:31
Why is it hard to cure Common Cold? | #aumsum
69
B1 Intermediate
US
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06:50
How much Water should you Drink per day? | #aumsum
108
B1 Intermediate
US
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05:14
What if earth lost Oxygen for 5 seconds? | #aumsum
43
B1 Intermediate
US
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07:17
The Human Heart | #aumsum
26
B2 High-Intermediate
US
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08:00
Layers of the Earth for Kids | #aumsum
11
B2 High-Intermediate
US
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08:35
Vermicomposting | #aumsum
10
B2 High-Intermediate
US
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05:58
Volume of a Sphere | #aumsum
8
B1 Intermediate
US
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05:28
Seed Germination | #aumsum
23
B2 High-Intermediate
US
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08:06
3 Types of Rocks | #aumsum
34
B2 High-Intermediate
US
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05:23
Phases of Moon | #aumsum
15
B1 Intermediate
US
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05:32
Why is Space Black? | #aumsum
14
B2 High-Intermediate
US
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