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.
Natasha, her older sister, suffered a head injury when she fell on the slopes in Quebec, but paramedics did not initially realise the seriousness of the impact, and it was only seven hours later that her injuries became apparent. She died the next day in New York, where she had been taken by air ambulance. She was 45. Her death devastated the family, her sister said in an interview with The Telegraph. It also led to the break-up of her relationship.