
For Decades, Cartographers Have Been Hiding Covert Illustrations Inside of Switzerland’s Official Maps
The first three dimensions—length, height, and depth—are included on all topographical maps. The “fourth dimension,” or time, is also available on the website of the Swiss Federal Office of Topography (Swisstopo). In the “Journey Through Time,” a timeline displays 175 years of the country’s cartogra
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Valonia ventricosa
Valonia ventricosa, also known as bubble algae, sea grape, or sailor's eyeballs, is a species of algae found in oceans throughout the world in tropical and subtropical regions, within the phylum Chlorophyta. It is one of the largest known unicellular organisms. Characteristics Valonia ventricosa has a coenocytic structure with multiple nuclei and chloroplasts. This organism possesses a large central vacuole that is multilobular in structure (lobules radiating from a central spheroid region). The entire cell contains several cytoplasmic domains, with each domain having a nucleus and a few chloroplasts. Cytoplasmic domains are interconnected by cytoplasmic "bridges" that are supported by microtubules. The peripheral cytoplasm (whose membrane is overlaid by the cell wall) is only about 40 nm thick. Valonia ventricosa typically grow individually...
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