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01:24
Why do woolen clothes keep us warm? | #aumsum
17
B1 Intermediate
US
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05:19
Newtons First Law of Motion
26
B1 Intermediate
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05:36
What is Diabetes? | #aumsum
42
B2 High-Intermediate
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01:34
How do vaccines work? | #aumsum
119
B1 Intermediate
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05:38
What is Arthritis? | #aumsum
40
B2 High-Intermediate
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07:07
Are Dolphins Smart? | #aumsum
36
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04:53
Why does salt make food taste better? | #aumsum
5
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06:23
What is a Hangover? | #aumsum
15
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01:04
What causes Sinkholes? | #aumsum
58
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01:04
What is sleep paralysis? | #aumsum
60
B1 Intermediate
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16:25
How to treat a bee sting? plus 9 more videos..…
11
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01:22
How do nails grow? | #aumsum
24
B1 Intermediate
US
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