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How can fur seals hold their breaths?
7
3462
How much oxygen do sea plants produce?
1039
22596
Can you hold your breath for 45 secs?
486
4264
Can you hold your breath longer than a fur seal?
661
35352
Should all scientists wear glasses?
26
3906
How do rays breathe underwater?
446
24141
How deep can fur seals dive?
21
3123
Riley confronts a big fear
5244
47764
Tricks to hold your breath longer
190
6655
Kelp, help!
2452
13858
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