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Tyrian purple is a pigment made from the mucus of several species of Murex snail. Production of Tyrian purple for use as a fabric dye began as early as 1200 BC by the Phoenicians, and was continued by the Greeks and Romans until 1453 AD, with the fall of Constantinople.
Purple is one of the least used colors in vexillology and heraldry. Currently, the color appears in only four national flags: that of Dominica, Spain, El Salvador, and Nicaragua, and one co-official national flag, the Wiphala (co-official national flag of Bolivia ). However, it is also present in the flags of several administrative subdivisions ...
Purple has long been associated with royalty, originally because Tyrian purple dye—made from the secretions of sea snails—was extremely expensive in antiquity. Purple was the color worn by Roman magistrates; it became the imperial color worn by the rulers of the Byzantine Empire and the Holy Roman Empire , and later by Roman Catholic bishops .
The Purple Earth Hypothesis (PEH) is an astrobiological hypothesis, first proposed by molecular biologist Shiladitya DasSarma in 2007, [1] that the earliest photosynthetic life forms of Early Earth were based on the simpler molecule retinal rather than the more complex porphyrin -based chlorophyll, making the surface biosphere appear purplish ...
Orange juice concentrate prices hit a high of $4.95 per pound in the futures market, up from below $1 per pound in January 2020, The Guardian reported. Just like many food-cost increases, you can ...
If you’re wondering why you’re seeing a wave of purple today, here's your answer: It's Spirit Day! Commemorated on the third Thursday of October every year, Spirit Day encourages millions to ...
Rather than a traditional awards-show saunter down the aisle, Prince was led to the stage in bulldozer fashion by one of those same bodyguards — the 6’8” Chick Huntsberry, who also appears ...
The origin of water on Earth is the subject of a body of research in the fields of planetary science, astronomy, and astrobiology. Earth is unique among the rocky planets in the Solar System in having oceans of liquid water on its surface. [2] Liquid water, which is necessary for all known forms of life, continues to exist on the surface of ...