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01:25
How do bees make honey? | #aumsum
42
B2 High-Intermediate
US
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00:58
Why do people grind their teeth? | #aumsum
11
B2 High-Intermediate
US
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01:04
What is sleep paralysis? | #aumsum
53
B1 Intermediate
US
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01:09
Why do we bite our nails? | #aumsum
49
B1 Intermediate
US
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00:56
Lateral Inversion - Why is ambulance written in…
42
B2 High-Intermediate
US
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01:17
Why do we get sunburn? | #aumsum
24
B2 High-Intermediate
US
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01:12
Is Gluten bad for you? | #aumsum
38
B1 Intermediate
US
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01:23
Concave Mirror - Why is your reflection upside…
37
B1 Intermediate
US
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01:06
Atmospheric Refraction - Why do stars twinkle?…
22
B1 Intermediate
US
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02:27
Refraction of Light - Why does a pencil look bent…
24
A2 Basic
US
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01:31
What if we stopped drinking water? | #aumsum
45
B2 High-Intermediate
US
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01:03
Taste Buds - Why mint tastes cold? | #aumsum
13
B2 High-Intermediate
US
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