- Alec Guinness (Wikipedia)
Sir Alec Guinness CH CBE (born Alec Guinness de Cuffe; 2 April 1914 – 5 August 2000) was an English actor. After an early career on the stage, Guinness was featured in several of the Ealing comedies, including Kind Hearts and Coronets (1949), in which he played eight characters; The Lavender Hill Mob (1951), for which he received his first Academy Award nomination; and The Ladykillers (1955). He collaborated six times with director David Lean: Herbert Pocket in Great Expectations (1946); Fagin in Oliver Twist (1948); Col. Nicholson in The Bridge on the River Kwai (1957), for which he won both the Academy Award for Best Actor and the BAFTA Award for Best Actor; Prince Faisal in Lawrence of Arabia (1962); General Yevgraf Zhivago in Doctor Zhivago (1965); and Professor Godbole in A Passage to India (1984). In 1970, he played Jacob Marley’s ghost in Ronald Neame’s Scrooge. He also portrayed Obi-Wan Kenobi in George Lucas’s original Star Wars trilogy which brought him further recognition; for the original 1977 film, he was nominated for Best Supporting Actor at the 50th Academy Awards.
- Limestone (Wikipedia)
Limestone (calcium carbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO3. Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life.