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Purple Rain Riot

Purple Rain Riot was an anti-apartheid protest held in Cape Town on September 2, 1989, four days before South Africa's racially segregated parliament held its elections. A police water cannon with purple dye was turned on thousands of Mass Democratic Movement supporters who poured into the city in an attempt to march on South Africa's Parliament. White office blocks adjacent to Greenmarket Square were sprayed purple four stories high as a protester leapt onto the roof of the water cannon vehicle, seized the nozzle and attempted to turn the jet away from the crowds.

Carlo Tononi

Carlo Annibale Tononi was a luthier who trained and worked with his father in the Tononi family workshop in Bologna, Italy. Before his death, Tononi modified his will to provide for his funeral. He requested that the proceeds from the sale of one of his cellos be used to pay for a mass to be said for his soul. On 21 April 1730, his executors published his will after his death. A genuine Tononi violin ranges in value from $45,000 to $450,000 depending on condition and provenance.

Diatoms

Diatoms are a major group of microorganisms found in the oceans, waterways and soils of the world. Living diatoms number in the trillions: they generate about 20 percent of the oxygen produced on the planet each year; take in over 6.7 billion metric tons of silicon each year from the oceans in which they live; and contribute nearly half of the organic material found in those oceans. The shells of dead diatoms can reach as much as a half mile deep on the ocean floor; and the entire Amazon basin is fertilized annually by 27 million tons of diatom shell dust transported by westerly transatlantic winds from the bed of a large dried up lake once covering much of the African Sahara. Diatoms are unicellular; they can live alone or form colonies, taking shapes such as ribbons, fans, zigzags, and stars.