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00:59
How do straws work? | #aumsum
19
B1 Intermediate
US
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05:57
Ohms Law | #aumsum
31
B1 Intermediate
US
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06:32
Why do leaves turn yellow? | #aumsum
18
B2 High-Intermediate
US
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01:01
What causes earthquakes? | #aumsum
90
B1 Intermediate
US
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06:25
Are Einsteins Gravitational Waves real? | #aumsum
14
B2 High-Intermediate
US
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07:22
Hydrocarbons | #aumsum
21
B2 High-Intermediate
US
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01:01
Pathogens - Why do we get fever? | #aumsum
52
B2 High-Intermediate
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01:00
What are tonsil stones? | #aumsum
16
B2 High-Intermediate
US
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05:31
Tyndall Effect - Why does the sky appear blue?…
18
B2 High-Intermediate
US
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01:03
What is an allergy? | #aumsum
50
B2 High-Intermediate
US
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01:51
Friction - Why is it difficult to pull a boat…
27
B1 Intermediate
US
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01:01
Water Purification - Why is alum added to water?…
36
B1 Intermediate
US
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