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01:04
Why is fluoride added to water? | #aumsum
27
B1 Intermediate
US
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01:05
Why are we addicted to Sugar? | #aumsum
24
B1 Intermediate
US
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01:37
Archimedes Principle - Why do we weigh less in…
24
B1 Intermediate
US
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01:00
How do migratory birds find their way? | #aumsum
28
B1 Intermediate
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00:59
How does placebo effect work? | #aumsum
31
B2 High-Intermediate
US
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01:31
Where does the fat go when you lose weight? |…
48
B1 Intermediate
US
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01:24
How are pearls formed? | #aumsum
20
B2 High-Intermediate
US
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00:58
Why do dogs wag their tails? | #aumsum
40
B1 Intermediate
US
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01:10
What are eye floaters? | #aumsum
30
B2 High-Intermediate
US
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01:01
How does an owl fly so silently? | #aumsum
11
B2 High-Intermediate
US
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02:09
Diffusion - Why can we smell hot food from a distance?…
13
B2 High-Intermediate
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01:05
How do chameleons change color? | #aumsum
56
A2 Basic
US
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