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02:33
Why do we have two eyes instead of one? | #aumsum
11
B1 Intermediate
US
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01:06
How do antacids work? | #aumsum
40
B1 Intermediate
US
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01:50
Why do stars seem higher than they actually are?…
5
B1 Intermediate
US
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02:08
Water Cycle for Kids | #aumsum
15
B1 Intermediate
US
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01:26
Why is soap ineffective in hard water? | #aumsum
8
B2 High-Intermediate
US
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01:02
What makes tattoos permanent? | #aumsum
12
B2 High-Intermediate
US
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00:56
How do fish breathe underwater? | #aumsum
10
B1 Intermediate
US
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01:04
Why do dogs lick their wounds? | #aumsum
31
B2 High-Intermediate
US
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01:04
What causes wrinkles? | #aumsum
14
B2 High-Intermediate
US
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00:51
Convex Lens - Can a magnifying glass burn paper?…
13
B2 High-Intermediate
US
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01:01
What is a Cataract? | #aumsum
17
B2 High-Intermediate
US
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00:50
What is Earwax? | #aumsum
11
B1 Intermediate
US
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