The term half-life describes how long it will take for half of the atoms to decay, and is constant for a given isotope. The curie the unit of measure used to describe the radioactivity of radioactive material. (1C = 3.7 X 1010 disintegrations/sec)
Maria Callas, 53, Is Dead of Heart Attack in Paris. By RAYMOND ERICSON. Maria Callas, the soprano whose intensely dramatic portrayals made her the most exciting opera singer of her time, died of a heart attack yesterday at her home in Paris. She was 53 years old.
Although the cause of death was not given, Knight had suffered from complications of diabetes and had a series of strokes last year. His health reportedly had declined drastically since the Grammy-winning Cruz, his wife of 41 years, died of a brain tumor in 2003 at age 77. Knight and Cruz met in Havana in 1950 when she replaced the lead singer in La Sonora Matancera, one of the island's most popular bands. They became good friends immediately, Knight told the Miami Herald in 2004, but there was nothing more..