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<p><span style="font-size: medium;">Video sources</span></p>
<p>https://www.youtube.com/watch?t=20&v=J7AWWpG52zg</p>
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<p>Reference</p>
<p>http://www.theverge.com/2015/1/6/7501075/bowhead-whale-genome-longevity-first-time-large-whale</p>
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