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01:09
Why do we bite our nails? | #aumsum
49
B1 Intermediate
US
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01:02
How do fireflies glow? | #aumsum
48
B2 High-Intermediate
US
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01:00
Caffeine - How does coffee keep you awake? | #aumsum
48
B2 High-Intermediate
US
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04:28
What causes Heartburn? | #aumsum
46
B2 High-Intermediate
US
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00:54
Why are flamingos pink? | #aumsum
46
B2 High-Intermediate
US
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01:06
Can jellyfish live forever? | #aumsum
46
C2 Advanced
US
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07:27
Why are some people Left Handed? | #aumsum
46
B1 Intermediate
US
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05:14
What if earth lost Oxygen for 5 seconds? | #aumsum
45
B1 Intermediate
US
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01:31
What if we stopped drinking water? | #aumsum
45
B2 High-Intermediate
US
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03:47
Why do we Love Chocolates? | #aumsum
45
B1 Intermediate
US
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01:35
Osmosis - How do fish drink water? | #aumsum
43
A2 Basic
US
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03:39
How is the principle of centrifugation helpful…
43
B1 Intermediate
US
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