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01:55
Why does sound travel faster in summer than in…
24
B1 Intermediate
US
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01:30
What causes kidney stones? | #aumsum
61
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01:01
Lunar Eclipse - Why does the moon turn red? |…
35
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03:00
How does a plastic comb attract paper? | #aumsum
35
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01:01
What is a stroke? | #aumsum
31
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02:26
Modes of Transportation | Videos for Kids | #aumsum
109
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01:04
Why does Saturn have rings? | #aumsum
22
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01:10
What is color blindness? | #aumsum
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01:04
What is a mirage? | #aumsum
14
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01:06
What is a tardigrade? | #aumsum
24
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01:09
Can animals predict natural disasters? | #aumsum
65
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01:29
What is asthma? | #aumsum
25
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