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An image that appears to show a bunch of little smiley faces peering out at the viewer from under a microscope has been circulating on the internet for years. In a meme that has been shared by social media users since May 2021, the image is accompanied by a caption that reads, This is what a blade of grass looks like under a microscope. Next time you take a walk outside, know that the grass is happy to see you. Although we were unable to find the original source of the above image, we did locate other microscopic images of grass with similar features. A discussion about the image cropped up in 2015 on the question-and-answer site StackExchange, where a user with an anonymous profile pointed to a similar image on a science stock photo website that was captioned: Maria Morrow, assistant professor of botany and environmental science at College of the Redwoods, pointed out that the smiley faces are in fact vascular bundles typical in plants called monocots — plants that are only composed of one leaf, like grass. So although the above image does depict the components of a real leaf cross section under a microscope, it's safe to say that the image doesn't in any literal sense show a leaf smiling or happy to see you. In fact, describing these characteristics as smiley faces is a subjective call. Looking at the image included in Morrow's article, one could argue the leaf is actually screaming at you: In other words, the smiley faces are just an illusion created by viewing a slice of the leaf's round vascular bundles from above, through a microscope lens.
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