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mold by FEI Company on Flickr.
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Chroococcus_Oggi_8897a by Wayne Lanier PhD on Flickr.
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Anabaena_HMC1000_9727a by Wayne Lanier PhD on Flickr.
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Sponge cross section, 100x by Marc Perkins - OCC Biology Department on Flickr.
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Sponge cross section, 200x by Marc Perkins - OCC Biology Department on Flickr.
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just another new neuron by Functional Neurogenesis on Flickr.
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untitled by Fernan Federici on Flickr.
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ZEISS Smartzoom 5 by ZEISS Microscopy on Flickr.
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tichoslapek:

This is sand photographed at 400x magnification! Photo credit: Yanping Wang
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post-mitotic:

I’m really into those biconcave discs
colored SEM
credit: Steve Schmeissner