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.
YouTube/Screenshot. Mexican actress Maria MarÃ­a Eugenia llamas best known for her  Character La  tucita in films from The Golden age Of mexican cinema Died Sunday. aug 31 from a heart. Attack it is reported that the actress died in a hospital In, Zapopan, jalisco due to cardiac. arrest