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01:00
What are tonsil stones? | #aumsum
15
B2 High-Intermediate
US
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05:31
Tyndall Effect - Why does the sky appear blue?…
16
B2 High-Intermediate
US
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03:36
Neutralization Reaction - How to treat a bee sting?…
30
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01:25
Why do we get dandruff? | #aumsum
29
B2 High-Intermediate
US
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01:34
Why do we get pimples? | #aumsum
19
B2 High-Intermediate
US
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01:03
What is an allergy? | #aumsum
46
B2 High-Intermediate
US
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06:36
Why is it hard to cure Alzheimers disease? | #aumsum
23
B1 Intermediate
US
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01:51
Friction - Why is it difficult to pull a boat…
17
B1 Intermediate
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01:01
Water Purification - Why is alum added to water?…
27
B1 Intermediate
US
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00:58
Why do people grind their teeth? | #aumsum
17
B2 High-Intermediate
US
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08:01
Can we Travel Faster than Light? | #aumsum
9
B1 Intermediate
US
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01:23
Why is blood red in color? | #aumsum
20
B1 Intermediate
US
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