A beautiful illustration of how our gut is able to absorb nutrients so efficiently.
Credit Dr Amy Engevik/Nikon Small World, from a collection of images from the Nikon Small World microphotography competition, posted in The Guardian. Here's a cross-section of beach grass (credit Gerhard Vlcek):
Posted for all those readers who took science courses (or pursued science careers) and spent uncountable hours just exploring the world as seen by a microscope.
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