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01:17
Why do we get sunburn? | #aumsum
24
B2 High-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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01:00
How do migratory birds find their way? | #aumsum
24
B1 Intermediate
US
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01:01
Water Purification - Why is alum added to water?…
23
B1 Intermediate
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02:24
Force, Work and Energy for Kids | #aumsum
22
A2 Basic
US
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02:31
Human Sense Organs | Videos for Kids | #aumsum
22
B1 Intermediate
US
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02:19
Buoyancy - Can you drown in the dead sea? | #aumsum
22
B2 High-Intermediate
US
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01:01
Lunar Eclipse - Why does the moon turn red? |…
22
B1 Intermediate
US
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01:10
What is a Tsunami? | #aumsum
22
B2 High-Intermediate
US
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01:25
Why do we get dandruff? | #aumsum
22
B2 High-Intermediate
US
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01:44
Why do we get Goosebumps? | #aumsum
21
A2 Basic
US
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01:06
Atmospheric Refraction - Why do stars twinkle?…
21
B1 Intermediate
US
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