![Microscopic-view-of-a-dark-clump-of-algae-changing-locations-in-the-culture-moving-around-it-into-and-out-of-focus](https://videocdn.cdnpk.net/cdn/content/video/premium/video0045/thumbnails/355_355-0111_small.jpg)
Microscopic view of a dark clump of algae changing locations in the culture moving around it into and out of focus
1080p 00:09
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