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The annual cycle of plant growth is not a mystery — plants grow in the spring and summer, and then largely stop in the winter. So while the main takeaway of this visualization shouldn't be a surprise, it is still really interesting to watch. Shared by Redditor u/BayesicallyThomas, the video shows satellite measurements of "Solar-Induced chlorophyll Fluorescence (SIF), a fluorescence signal from chlorophyll that's emitted during photosynthesis" over a two year period:

The visualization drives home just how barren much of the western United States is compared to the east, and also highlights the effects of agriculture — the deep green of the Corn Belt is highly visible across the Midwest, while the rice fields along the Mississippi appear as a dead zone early in the spring before catching up later in the summer, thanks to their delayed growth cycle.

[Via Reddit]

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Long before we got this funny idea that maps had to be truthful, before Edney's ideal of cartography took hold, maps were full of conjectures, rumors, mistakes in surveying and even some outright frauds.

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