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06:49
Why is it hard to Cure Cancer? | #aumsum
20
B2 High-Intermediate
US
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05:16
Life Cycle of a Butterfly | #aumsum
70
B2 High-Intermediate
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06:11
Global Warming for Kids | #aumsum
64
B1 Intermediate
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05:36
What is Diabetes? | #aumsum
32
B2 High-Intermediate
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05:28
Seed Germination | #aumsum
32
B2 High-Intermediate
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06:14
Structure of a Neuron | #aumsum
11
B2 High-Intermediate
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05:10
Science of Snowflakes | #aumsum
7
B2 High-Intermediate
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06:54
How do we know that our Stomach is Full? | #aumsum
53
B1 Intermediate
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07:07
Are Dolphins Smart? | #aumsum
32
B2 High-Intermediate
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07:26
Nitrogen Cycle | #aumsum
10
B2 High-Intermediate
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07:27
Why are some people Left Handed? | #aumsum
46
B1 Intermediate
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06:50
How much Water should you Drink per day? | #aumsum
110
B1 Intermediate
US
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